1 | <?php |
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2 | /** |
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3 | ADOdb Date Library, part of the ADOdb abstraction library |
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4 | Download: http://php.weblogs.com/adodb_date_time_library |
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5 | |
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6 | PHP native date functions use integer timestamps for computations. |
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7 | Because of this, dates are restricted to the years 1901-2038 on Unix |
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8 | and 1970-2038 on Windows due to integer overflow for dates beyond |
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9 | those years. This library overcomes these limitations by replacing the |
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10 | native function's signed integers (normally 32-bits) with PHP floating |
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11 | point numbers (normally 64-bits). |
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12 | |
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13 | Dates from 100 A.D. to 3000 A.D. and later |
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14 | have been tested. The minimum is 100 A.D. as <100 will invoke the |
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15 | 2 => 4 digit year conversion. The maximum is billions of years in the |
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16 | future, but this is a theoretical limit as the computation of that year |
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17 | would take too long with the current implementation of adodb_mktime(). |
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18 | |
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19 | This library replaces native functions as follows: |
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20 | |
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21 | <pre> |
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22 | getdate() with adodb_getdate() |
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23 | date() with adodb_date() |
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24 | gmdate() with adodb_gmdate() |
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25 | mktime() with adodb_mktime() |
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26 | gmmktime() with adodb_gmmktime() |
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27 | </pre> |
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28 | |
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29 | The parameters are identical, except that adodb_date() accepts a subset |
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30 | of date()'s field formats. Mktime() will convert from local time to GMT, |
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31 | and date() will convert from GMT to local time, but daylight savings is |
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32 | not handled currently. |
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33 | |
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34 | This library is independant of the rest of ADOdb, and can be used |
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35 | as standalone code. |
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36 | |
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37 | PERFORMANCE |
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38 | |
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39 | For high speed, this library uses the native date functions where |
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40 | possible, and only switches to PHP code when the dates fall outside |
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41 | the 32-bit signed integer range. |
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42 | |
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43 | GREGORIAN CORRECTION |
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44 | |
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45 | Pope Gregory shortened October of A.D. 1582 by ten days. Thursday, |
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46 | October 4, 1582 (Julian) was followed immediately by Friday, October 15, |
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47 | 1582 (Gregorian). |
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48 | |
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49 | Since 0.06, we handle this correctly, so: |
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50 | |
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51 | adodb_mktime(0,0,0,10,15,1582) - adodb_mktime(0,0,0,10,4,1582) |
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52 | == 24 * 3600 (1 day) |
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53 | |
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54 | ============================================================================= |
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55 | |
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56 | COPYRIGHT |
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57 | |
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58 | (c) 2003 John Lim and released under BSD-style license except for code by jackbbs, |
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59 | which includes adodb_mktime, adodb_get_gmt_diff, adodb_is_leap_year |
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60 | and originally found at http://www.php.net/manual/en/function.mktime.php |
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61 | |
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62 | ============================================================================= |
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63 | |
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64 | BUG REPORTS |
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65 | |
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66 | These should be posted to the ADOdb forums at |
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67 | |
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68 | http://phplens.com/lens/lensforum/topics.php?id=4 |
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69 | |
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70 | ============================================================================= |
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71 | |
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72 | FUNCTION DESCRIPTIONS |
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73 | |
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74 | |
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75 | FUNCTION adodb_getdate($date=false) |
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76 | |
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77 | Returns an array containing date information, as getdate(), but supports |
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78 | dates greater than 1901 to 2038. |
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79 | |
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80 | |
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81 | FUNCTION adodb_date($fmt, $timestamp = false) |
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82 | |
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83 | Convert a timestamp to a formatted local date. If $timestamp is not defined, the |
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84 | current timestamp is used. Unlike the function date(), it supports dates |
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85 | outside the 1901 to 2038 range. |
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86 | |
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87 | The format fields that adodb_date supports: |
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88 | |
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89 | <pre> |
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90 | a - "am" or "pm" |
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91 | A - "AM" or "PM" |
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92 | d - day of the month, 2 digits with leading zeros; i.e. "01" to "31" |
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93 | D - day of the week, textual, 3 letters; e.g. "Fri" |
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94 | F - month, textual, long; e.g. "January" |
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95 | g - hour, 12-hour format without leading zeros; i.e. "1" to "12" |
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96 | G - hour, 24-hour format without leading zeros; i.e. "0" to "23" |
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97 | h - hour, 12-hour format; i.e. "01" to "12" |
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98 | H - hour, 24-hour format; i.e. "00" to "23" |
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99 | i - minutes; i.e. "00" to "59" |
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100 | j - day of the month without leading zeros; i.e. "1" to "31" |
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101 | l (lowercase 'L') - day of the week, textual, long; e.g. "Friday" |
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102 | L - boolean for whether it is a leap year; i.e. "0" or "1" |
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103 | m - month; i.e. "01" to "12" |
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104 | M - month, textual, 3 letters; e.g. "Jan" |
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105 | n - month without leading zeros; i.e. "1" to "12" |
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106 | O - Difference to Greenwich time in hours; e.g. "+0200" |
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107 | Q - Quarter, as in 1, 2, 3, 4 |
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108 | r - RFC 822 formatted date; e.g. "Thu, 21 Dec 2000 16:01:07 +0200" |
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109 | s - seconds; i.e. "00" to "59" |
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110 | S - English ordinal suffix for the day of the month, 2 characters; |
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111 | i.e. "st", "nd", "rd" or "th" |
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112 | t - number of days in the given month; i.e. "28" to "31" |
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113 | T - Timezone setting of this machine; e.g. "EST" or "MDT" |
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114 | U - seconds since the Unix Epoch (January 1 1970 00:00:00 GMT) |
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115 | w - day of the week, numeric, i.e. "0" (Sunday) to "6" (Saturday) |
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116 | Y - year, 4 digits; e.g. "1999" |
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117 | y - year, 2 digits; e.g. "99" |
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118 | z - day of the year; i.e. "0" to "365" |
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119 | Z - timezone offset in seconds (i.e. "-43200" to "43200"). |
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120 | The offset for timezones west of UTC is always negative, |
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121 | and for those east of UTC is always positive. |
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122 | </pre> |
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123 | |
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124 | Unsupported: |
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125 | <pre> |
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126 | B - Swatch Internet time |
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127 | I (capital i) - "1" if Daylight Savings Time, "0" otherwise. |
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128 | W - ISO-8601 week number of year, weeks starting on Monday |
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129 | |
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130 | </pre> |
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131 | |
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132 | FUNCTION adodb_date2($fmt, $isoDateString = false) |
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133 | Same as adodb_date, but 2nd parameter accepts iso date, eg. |
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134 | |
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135 | adodb_date2('d-M-Y H:i','2003-12-25 13:01:34'); |
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136 | |
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137 | FUNCTION adodb_gmdate($fmt, $timestamp = false) |
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138 | |
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139 | Convert a timestamp to a formatted GMT date. If $timestamp is not defined, the |
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140 | current timestamp is used. Unlike the function date(), it supports dates |
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141 | outside the 1901 to 2038 range. |
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142 | |
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143 | |
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144 | FUNCTION adodb_mktime($hr, $min, $sec [, $month, $day, $year]) |
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145 | |
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146 | Converts a local date to a unix timestamp. Unlike the function mktime(), it supports |
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147 | dates outside the 1901 to 2038 range. Differs from mktime() in that all parameters |
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148 | are currently compulsory. |
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149 | |
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150 | FUNCTION adodb_gmmktime($hr, $min, $sec [, $month, $day, $year]) |
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151 | |
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152 | Converts a gmt date to a unix timestamp. Unlike the function gmmktime(), it supports |
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153 | dates outside the 1901 to 2038 range. Differs from gmmktime() in that all parameters |
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154 | are currently compulsory. |
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155 | |
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156 | ============================================================================= |
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157 | |
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158 | NOTES |
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159 | |
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160 | Useful url for generating test timestamps: |
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161 | http://www.4webhelp.net/us/timestamp.php |
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162 | |
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163 | Possible future optimizations include |
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164 | |
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165 | a. Using an algorithm similar to Plauger's in "The Standard C Library" |
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166 | (page 428, xttotm.c _Ttotm() function). Plauger's algorithm will not |
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167 | work outside 32-bit signed range, so i decided not to implement it. |
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168 | |
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169 | b. Iterate over a block of years (say 12) when searching for the |
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170 | correct year. |
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171 | |
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172 | c. Implement daylight savings, which looks awfully complicated, see |
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173 | http://webexhibits.org/daylightsaving/ |
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174 | |
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175 | |
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176 | CHANGELOG |
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177 | - 18 July 2004 0.15 |
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178 | All params in adodb_mktime were formerly compulsory. Now only the hour, min, secs is compulsory. This |
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179 | brings it more in line with mktime (still not identical). |
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180 | |
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181 | - 23 June 2004 0.14 |
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182 | |
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183 | Allow you to define your own daylights savings function, adodb_daylight_sv. |
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184 | If the function is defined (somewhere in an include), then you can correct for daylights savings. |
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185 | |
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186 | In this example, we apply daylights savings in June or July, adding one hour. This is extremely |
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187 | unrealistic as it does not take into account time-zone, geographic location, current year. |
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188 | |
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189 | function adodb_daylight_sv(&$arr, $is_gmt) |
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190 | { |
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191 | if ($is_gmt) return; |
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192 | $m = $arr['mon']; |
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193 | if ($m == 6 || $m == 7) $arr['hours'] += 1; |
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194 | } |
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195 | |
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196 | This is only called by adodb_date() and not by adodb_mktime(). |
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197 | |
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198 | The format of $arr is |
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199 | Array ( |
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200 | [seconds] => 0 |
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201 | [minutes] => 0 |
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202 | [hours] => 0 |
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203 | [mday] => 1 # day of month, eg 1st day of the month |
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204 | [mon] => 2 # month (eg. Feb) |
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205 | [year] => 2102 |
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206 | [yday] => 31 # days in current year |
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207 | [leap] => # true if leap year |
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208 | [ndays] => 28 # no of days in current month |
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209 | ) |
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210 | |
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211 | |
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212 | - 28 Apr 2004 0.13 |
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213 | Fixed adodb_date to properly support $is_gmt. Thx to Dimitar Angelov. |
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214 | |
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215 | - 20 Mar 2004 0.12 |
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216 | Fixed month calculation error in adodb_date. 2102-June-01 appeared as 2102-May-32. |
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217 | |
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218 | - 26 Oct 2003 0.11 |
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219 | Because of daylight savings problems (some systems apply daylight savings to |
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220 | January!!!), changed adodb_get_gmt_diff() to ignore daylight savings. |
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221 | |
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222 | - 9 Aug 2003 0.10 |
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223 | Fixed bug with dates after 2038. |
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224 | See http://phplens.com/lens/lensforum/msgs.php?id=6980 |
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225 | |
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226 | - 1 July 2003 0.09 |
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227 | Added support for Q (Quarter). |
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228 | Added adodb_date2(), which accepts ISO date in 2nd param |
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229 | |
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230 | - 3 March 2003 0.08 |
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231 | Added support for 'S' adodb_date() format char. Added constant ADODB_ALLOW_NEGATIVE_TS |
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232 | if you want PHP to handle negative timestamps between 1901 to 1969. |
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233 | |
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234 | - 27 Feb 2003 0.07 |
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235 | All negative numbers handled by adodb now because of RH 7.3+ problems. |
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236 | See http://bugs.php.net/bug.php?id=20048&edit=2 |
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237 | |
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238 | - 4 Feb 2003 0.06 |
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239 | Fixed a typo, 1852 changed to 1582! This means that pre-1852 dates |
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240 | are now correctly handled. |
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241 | |
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242 | - 29 Jan 2003 0.05 |
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243 | |
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244 | Leap year checking differs under Julian calendar (pre 1582). Also |
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245 | leap year code optimized by checking for most common case first. |
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246 | |
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247 | We also handle month overflow correctly in mktime (eg month set to 13). |
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248 | |
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249 | Day overflow for less than one month's days is supported. |
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250 | |
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251 | - 28 Jan 2003 0.04 |
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252 | |
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253 | Gregorian correction handled. In PHP5, we might throw an error if |
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254 | mktime uses invalid dates around 5-14 Oct 1582. Released with ADOdb 3.10. |
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255 | Added limbo 5-14 Oct 1582 check, when we set to 15 Oct 1582. |
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256 | |
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257 | - 27 Jan 2003 0.03 |
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258 | |
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259 | Fixed some more month problems due to gmt issues. Added constant ADODB_DATE_VERSION. |
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260 | Fixed calculation of days since start of year for <1970. |
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261 | |
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262 | - 27 Jan 2003 0.02 |
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263 | |
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264 | Changed _adodb_getdate() to inline leap year checking for better performance. |
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265 | Fixed problem with time-zones west of GMT +0000. |
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266 | |
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267 | - 24 Jan 2003 0.01 |
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268 | |
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269 | First implementation. |
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270 | */ |
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271 | |
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272 | |
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273 | /* Initialization */ |
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274 | |
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275 | /* |
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276 | Version Number |
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277 | */ |
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278 | define('ADODB_DATE_VERSION',0.15); |
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279 | |
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280 | /* |
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281 | We check for Windows as only +ve ints are accepted as dates on Windows. |
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282 | |
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283 | Apparently this problem happens also with Linux, RH 7.3 and later! |
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284 | |
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285 | glibc-2.2.5-34 and greater has been changed to return -1 for dates < |
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286 | 1970. This used to work. The problem exists with RedHat 7.3 and 8.0 |
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287 | echo (mktime(0, 0, 0, 1, 1, 1960)); // prints -1 |
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288 | |
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289 | References: |
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290 | http://bugs.php.net/bug.php?id=20048&edit=2 |
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291 | http://lists.debian.org/debian-glibc/2002/debian-glibc-200205/msg00010.html |
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292 | */ |
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293 | |
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294 | if (!defined('ADODB_ALLOW_NEGATIVE_TS')) define('ADODB_NO_NEGATIVE_TS',1); |
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295 | |
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296 | function adodb_date_test_date($y1,$m) |
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297 | { |
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298 | //print " $y1/$m "; |
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299 | $t = adodb_mktime(0,0,0,$m,13,$y1); |
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300 | if ("$y1-$m-13 00:00:00" != adodb_date('Y-n-d H:i:s',$t)) { |
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301 | print "<b>$y1 error</b><br>"; |
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302 | return false; |
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303 | } |
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304 | return true; |
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305 | } |
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306 | /** |
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307 | Test Suite |
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308 | */ |
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309 | function adodb_date_test() |
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310 | { |
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311 | |
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312 | error_reporting(E_ALL); |
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313 | print "<h4>Testing adodb_date and adodb_mktime. version=".ADODB_DATE_VERSION. "</h4>"; |
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314 | @set_time_limit(0); |
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315 | $fail = false; |
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316 | |
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317 | // This flag disables calling of PHP native functions, so we can properly test the code |
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318 | if (!defined('ADODB_TEST_DATES')) define('ADODB_TEST_DATES',1); |
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319 | |
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320 | $t = adodb_mktime(0,0,0); |
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321 | if (!(adodb_date('Y-m-d') == date('Y-m-d'))) print 'Error in '.adodb_mktime(0,0,0).'<br>'; |
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322 | |
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323 | $t = adodb_mktime(0,0,0,6,1,2102); |
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324 | if (!(adodb_date('Y-m-d',$t) == '2102-06-01')) print 'Error in '.adodb_date('Y-m-d',$t).'<br>'; |
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325 | |
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326 | $t = adodb_mktime(0,0,0,2,1,2102); |
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327 | if (!(adodb_date('Y-m-d',$t) == '2102-02-01')) print 'Error in '.adodb_date('Y-m-d',$t).'<br>'; |
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328 | |
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329 | |
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330 | print "<p>Testing gregorian <=> julian conversion<p>"; |
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331 | $t = adodb_mktime(0,0,0,10,11,1492); |
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332 | //http://www.holidayorigins.com/html/columbus_day.html - Friday check |
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333 | if (!(adodb_date('D Y-m-d',$t) == 'Fri 1492-10-11')) print 'Error in Columbus landing<br>'; |
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334 | |
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335 | $t = adodb_mktime(0,0,0,2,29,1500); |
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336 | if (!(adodb_date('Y-m-d',$t) == '1500-02-29')) print 'Error in julian leap years<br>'; |
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337 | |
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338 | $t = adodb_mktime(0,0,0,2,29,1700); |
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339 | if (!(adodb_date('Y-m-d',$t) == '1700-03-01')) print 'Error in gregorian leap years<br>'; |
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340 | |
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341 | print adodb_mktime(0,0,0,10,4,1582).' '; |
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342 | print adodb_mktime(0,0,0,10,15,1582); |
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343 | $diff = (adodb_mktime(0,0,0,10,15,1582) - adodb_mktime(0,0,0,10,4,1582)); |
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344 | if ($diff != 3600*24) print " <b>Error in gregorian correction = ".($diff/3600/24)." days </b><br>"; |
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345 | |
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346 | print " 15 Oct 1582, Fri=".(adodb_dow(1582,10,15) == 5 ? 'Fri' : '<b>Error</b>')."<br>"; |
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347 | print " 4 Oct 1582, Thu=".(adodb_dow(1582,10,4) == 4 ? 'Thu' : '<b>Error</b>')."<br>"; |
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348 | |
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349 | print "<p>Testing overflow<p>"; |
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350 | |
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351 | $t = adodb_mktime(0,0,0,3,33,1965); |
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352 | if (!(adodb_date('Y-m-d',$t) == '1965-04-02')) print 'Error in day overflow 1 <br>'; |
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353 | $t = adodb_mktime(0,0,0,4,33,1971); |
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354 | if (!(adodb_date('Y-m-d',$t) == '1971-05-03')) print 'Error in day overflow 2 <br>'; |
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355 | $t = adodb_mktime(0,0,0,1,60,1965); |
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356 | if (!(adodb_date('Y-m-d',$t) == '1965-03-01')) print 'Error in day overflow 3 '.adodb_date('Y-m-d',$t).' <br>'; |
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357 | $t = adodb_mktime(0,0,0,12,32,1965); |
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358 | if (!(adodb_date('Y-m-d',$t) == '1966-01-01')) print 'Error in day overflow 4 '.adodb_date('Y-m-d',$t).' <br>'; |
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359 | $t = adodb_mktime(0,0,0,12,63,1965); |
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360 | if (!(adodb_date('Y-m-d',$t) == '1966-02-01')) print 'Error in day overflow 5 '.adodb_date('Y-m-d',$t).' <br>'; |
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361 | $t = adodb_mktime(0,0,0,13,3,1965); |
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362 | if (!(adodb_date('Y-m-d',$t) == '1966-01-03')) print 'Error in mth overflow 1 <br>'; |
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363 | |
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364 | print "Testing 2-digit => 4-digit year conversion<p>"; |
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365 | if (adodb_year_digit_check(00) != 2000) print "Err 2-digit 2000<br>"; |
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366 | if (adodb_year_digit_check(10) != 2010) print "Err 2-digit 2010<br>"; |
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367 | if (adodb_year_digit_check(20) != 2020) print "Err 2-digit 2020<br>"; |
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368 | if (adodb_year_digit_check(30) != 2030) print "Err 2-digit 2030<br>"; |
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369 | if (adodb_year_digit_check(40) != 1940) print "Err 2-digit 1940<br>"; |
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370 | if (adodb_year_digit_check(50) != 1950) print "Err 2-digit 1950<br>"; |
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371 | if (adodb_year_digit_check(90) != 1990) print "Err 2-digit 1990<br>"; |
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372 | |
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373 | // Test string formating |
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374 | print "<p>Testing date formating</p>"; |
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375 | $fmt = '\d\a\t\e T Y-m-d H:i:s a A d D F g G h H i j l L m M n O \R\F\C822 r s t U w y Y z Z 2003'; |
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376 | $s1 = date($fmt,0); |
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377 | $s2 = adodb_date($fmt,0); |
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378 | if ($s1 != $s2) { |
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379 | print " date() 0 failed<br>$s1<br>$s2<br>"; |
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380 | } |
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381 | flush(); |
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382 | for ($i=100; --$i > 0; ) { |
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383 | |
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384 | $ts = 3600.0*((rand()%60000)+(rand()%60000))+(rand()%60000); |
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385 | $s1 = date($fmt,$ts); |
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386 | $s2 = adodb_date($fmt,$ts); |
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387 | //print "$s1 <br>$s2 <p>"; |
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388 | $pos = strcmp($s1,$s2); |
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389 | |
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390 | if (($s1) != ($s2)) { |
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391 | for ($j=0,$k=strlen($s1); $j < $k; $j++) { |
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392 | if ($s1[$j] != $s2[$j]) { |
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393 | print substr($s1,$j).' '; |
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394 | break; |
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395 | } |
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396 | } |
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397 | print "<b>Error date(): $ts<br><pre> |
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398 | \"$s1\" (date len=".strlen($s1).") |
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399 | \"$s2\" (adodb_date len=".strlen($s2).")</b></pre><br>"; |
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400 | $fail = true; |
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401 | } |
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402 | |
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403 | $a1 = getdate($ts); |
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404 | $a2 = adodb_getdate($ts); |
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405 | $rez = array_diff($a1,$a2); |
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406 | if (sizeof($rez)>0) { |
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407 | print "<b>Error getdate() $ts</b><br>"; |
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408 | print_r($a1); |
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409 | print "<br>"; |
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410 | print_r($a2); |
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411 | print "<p>"; |
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412 | $fail = true; |
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413 | } |
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414 | } |
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415 | |
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416 | // Test generation of dates outside 1901-2038 |
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417 | print "<p>Testing random dates between 100 and 4000</p>"; |
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418 | adodb_date_test_date(100,1); |
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419 | for ($i=100; --$i >= 0;) { |
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420 | $y1 = 100+rand(0,1970-100); |
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421 | $m = rand(1,12); |
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422 | adodb_date_test_date($y1,$m); |
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423 | |
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424 | $y1 = 3000-rand(0,3000-1970); |
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425 | adodb_date_test_date($y1,$m); |
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426 | } |
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427 | print '<p>'; |
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428 | $start = 1960+rand(0,10); |
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429 | $yrs = 12; |
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430 | $i = 365.25*86400*($start-1970); |
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431 | $offset = 36000+rand(10000,60000); |
---|
432 | $max = 365*$yrs*86400; |
---|
433 | $lastyear = 0; |
---|
434 | |
---|
435 | // we generate a timestamp, convert it to a date, and convert it back to a timestamp |
---|
436 | // and check if the roundtrip broke the original timestamp value. |
---|
437 | print "Testing $start to ".($start+$yrs).", or $max seconds, offset=$offset: "; |
---|
438 | $cnt = 0; |
---|
439 | for ($max += $i; $i < $max; $i += $offset) { |
---|
440 | $ret = adodb_date('m,d,Y,H,i,s',$i); |
---|
441 | $arr = explode(',',$ret); |
---|
442 | if ($lastyear != $arr[2]) { |
---|
443 | $lastyear = $arr[2]; |
---|
444 | print " $lastyear "; |
---|
445 | flush(); |
---|
446 | } |
---|
447 | $newi = adodb_mktime($arr[3],$arr[4],$arr[5],$arr[0],$arr[1],$arr[2]); |
---|
448 | if ($i != $newi) { |
---|
449 | print "Error at $i, adodb_mktime returned $newi ($ret)"; |
---|
450 | $fail = true; |
---|
451 | break; |
---|
452 | } |
---|
453 | $cnt += 1; |
---|
454 | } |
---|
455 | echo "Tested $cnt dates<br>"; |
---|
456 | if (!$fail) print "<p>Passed !</p>"; |
---|
457 | else print "<p><b>Failed</b> :-(</p>"; |
---|
458 | } |
---|
459 | |
---|
460 | /** |
---|
461 | Returns day of week, 0 = Sunday,... 6=Saturday. |
---|
462 | Algorithm from PEAR::Date_Calc |
---|
463 | */ |
---|
464 | function adodb_dow($year, $month, $day) |
---|
465 | { |
---|
466 | /* |
---|
467 | Pope Gregory removed 10 days - October 5 to October 14 - from the year 1582 and |
---|
468 | proclaimed that from that time onwards 3 days would be dropped from the calendar |
---|
469 | every 400 years. |
---|
470 | |
---|
471 | Thursday, October 4, 1582 (Julian) was followed immediately by Friday, October 15, 1582 (Gregorian). |
---|
472 | */ |
---|
473 | if ($year <= 1582) { |
---|
474 | if ($year < 1582 || |
---|
475 | ($year == 1582 && ($month < 10 || ($month == 10 && $day < 15)))) $greg_correction = 3; |
---|
476 | else |
---|
477 | $greg_correction = 0; |
---|
478 | } else |
---|
479 | $greg_correction = 0; |
---|
480 | |
---|
481 | if($month > 2) |
---|
482 | $month -= 2; |
---|
483 | else { |
---|
484 | $month += 10; |
---|
485 | $year--; |
---|
486 | } |
---|
487 | |
---|
488 | $day = ( floor((13 * $month - 1) / 5) + |
---|
489 | $day + ($year % 100) + |
---|
490 | floor(($year % 100) / 4) + |
---|
491 | floor(($year / 100) / 4) - 2 * |
---|
492 | floor($year / 100) + 77); |
---|
493 | |
---|
494 | return (($day - 7 * floor($day / 7))) + $greg_correction; |
---|
495 | } |
---|
496 | |
---|
497 | |
---|
498 | /** |
---|
499 | Checks for leap year, returns true if it is. No 2-digit year check. Also |
---|
500 | handles julian calendar correctly. |
---|
501 | */ |
---|
502 | function _adodb_is_leap_year($year) |
---|
503 | { |
---|
504 | if ($year % 4 != 0) return false; |
---|
505 | |
---|
506 | if ($year % 400 == 0) { |
---|
507 | return true; |
---|
508 | // if gregorian calendar (>1582), century not-divisible by 400 is not leap |
---|
509 | } else if ($year > 1582 && $year % 100 == 0 ) { |
---|
510 | return false; |
---|
511 | } |
---|
512 | |
---|
513 | return true; |
---|
514 | } |
---|
515 | |
---|
516 | /** |
---|
517 | checks for leap year, returns true if it is. Has 2-digit year check |
---|
518 | */ |
---|
519 | function adodb_is_leap_year($year) |
---|
520 | { |
---|
521 | return _adodb_is_leap_year(adodb_year_digit_check($year)); |
---|
522 | } |
---|
523 | |
---|
524 | /** |
---|
525 | Fix 2-digit years. Works for any century. |
---|
526 | Assumes that if 2-digit is more than 30 years in future, then previous century. |
---|
527 | */ |
---|
528 | function adodb_year_digit_check($y) |
---|
529 | { |
---|
530 | if ($y < 100) { |
---|
531 | |
---|
532 | $yr = (integer) date("Y"); |
---|
533 | $century = (integer) ($yr /100); |
---|
534 | |
---|
535 | if ($yr%100 > 50) { |
---|
536 | $c1 = $century + 1; |
---|
537 | $c0 = $century; |
---|
538 | } else { |
---|
539 | $c1 = $century; |
---|
540 | $c0 = $century - 1; |
---|
541 | } |
---|
542 | $c1 *= 100; |
---|
543 | // if 2-digit year is less than 30 years in future, set it to this century |
---|
544 | // otherwise if more than 30 years in future, then we set 2-digit year to the prev century. |
---|
545 | if (($y + $c1) < $yr+30) $y = $y + $c1; |
---|
546 | else $y = $y + $c0*100; |
---|
547 | } |
---|
548 | return $y; |
---|
549 | } |
---|
550 | |
---|
551 | /** |
---|
552 | get local time zone offset from GMT |
---|
553 | */ |
---|
554 | function adodb_get_gmt_diff() |
---|
555 | { |
---|
556 | static $TZ; |
---|
557 | if (isset($TZ)) return $TZ; |
---|
558 | |
---|
559 | $TZ = mktime(0,0,0,1,2,1970,0) - gmmktime(0,0,0,1,2,1970,0); |
---|
560 | return $TZ; |
---|
561 | } |
---|
562 | |
---|
563 | /** |
---|
564 | Returns an array with date info. |
---|
565 | */ |
---|
566 | function adodb_getdate($d=false,$fast=false) |
---|
567 | { |
---|
568 | if ($d === false) return getdate(); |
---|
569 | if (!defined('ADODB_TEST_DATES')) { |
---|
570 | if ((abs($d) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range |
---|
571 | if (!defined('ADODB_NO_NEGATIVE_TS') || $d >= 0) // if windows, must be +ve integer |
---|
572 | return @getdate($d); |
---|
573 | } |
---|
574 | } |
---|
575 | return _adodb_getdate($d); |
---|
576 | } |
---|
577 | |
---|
578 | /** |
---|
579 | Low-level function that returns the getdate() array. We have a special |
---|
580 | $fast flag, which if set to true, will return fewer array values, |
---|
581 | and is much faster as it does not calculate dow, etc. |
---|
582 | */ |
---|
583 | function _adodb_getdate($origd=false,$fast=false,$is_gmt=false) |
---|
584 | { |
---|
585 | $d = $origd - ($is_gmt ? 0 : adodb_get_gmt_diff()); |
---|
586 | |
---|
587 | $_day_power = 86400; |
---|
588 | $_hour_power = 3600; |
---|
589 | $_min_power = 60; |
---|
590 | |
---|
591 | if ($d < -12219321600) $d -= 86400*10; // if 15 Oct 1582 or earlier, gregorian correction |
---|
592 | |
---|
593 | $_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31); |
---|
594 | $_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31); |
---|
595 | |
---|
596 | $d366 = $_day_power * 366; |
---|
597 | $d365 = $_day_power * 365; |
---|
598 | |
---|
599 | if ($d < 0) { |
---|
600 | $origd = $d; |
---|
601 | // The valid range of a 32bit signed timestamp is typically from |
---|
602 | // Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT |
---|
603 | for ($a = 1970 ; --$a >= 0;) { |
---|
604 | $lastd = $d; |
---|
605 | |
---|
606 | if ($leaf = _adodb_is_leap_year($a)) $d += $d366; |
---|
607 | else $d += $d365; |
---|
608 | |
---|
609 | if ($d >= 0) { |
---|
610 | $year = $a; |
---|
611 | break; |
---|
612 | } |
---|
613 | } |
---|
614 | |
---|
615 | $secsInYear = 86400 * ($leaf ? 366 : 365) + $lastd; |
---|
616 | |
---|
617 | $d = $lastd; |
---|
618 | $mtab = ($leaf) ? $_month_table_leaf : $_month_table_normal; |
---|
619 | for ($a = 13 ; --$a > 0;) { |
---|
620 | $lastd = $d; |
---|
621 | $d += $mtab[$a] * $_day_power; |
---|
622 | if ($d >= 0) { |
---|
623 | $month = $a; |
---|
624 | $ndays = $mtab[$a]; |
---|
625 | break; |
---|
626 | } |
---|
627 | } |
---|
628 | |
---|
629 | $d = $lastd; |
---|
630 | $day = $ndays + ceil(($d+1) / ($_day_power)); |
---|
631 | |
---|
632 | $d += ($ndays - $day+1)* $_day_power; |
---|
633 | $hour = floor($d/$_hour_power); |
---|
634 | |
---|
635 | } else { |
---|
636 | for ($a = 1970 ;; $a++) { |
---|
637 | $lastd = $d; |
---|
638 | |
---|
639 | if ($leaf = _adodb_is_leap_year($a)) $d -= $d366; |
---|
640 | else $d -= $d365; |
---|
641 | if ($d < 0) { |
---|
642 | $year = $a; |
---|
643 | break; |
---|
644 | } |
---|
645 | } |
---|
646 | $secsInYear = $lastd; |
---|
647 | $d = $lastd; |
---|
648 | $mtab = ($leaf) ? $_month_table_leaf : $_month_table_normal; |
---|
649 | for ($a = 1 ; $a <= 12; $a++) { |
---|
650 | $lastd = $d; |
---|
651 | $d -= $mtab[$a] * $_day_power; |
---|
652 | if ($d < 0) { |
---|
653 | $month = $a; |
---|
654 | $ndays = $mtab[$a]; |
---|
655 | break; |
---|
656 | } |
---|
657 | } |
---|
658 | $d = $lastd; |
---|
659 | $day = ceil(($d+1) / $_day_power); |
---|
660 | $d = $d - ($day-1) * $_day_power; |
---|
661 | $hour = floor($d /$_hour_power); |
---|
662 | } |
---|
663 | |
---|
664 | $d -= $hour * $_hour_power; |
---|
665 | $min = floor($d/$_min_power); |
---|
666 | $secs = $d - $min * $_min_power; |
---|
667 | if ($fast) { |
---|
668 | return array( |
---|
669 | 'seconds' => $secs, |
---|
670 | 'minutes' => $min, |
---|
671 | 'hours' => $hour, |
---|
672 | 'mday' => $day, |
---|
673 | 'mon' => $month, |
---|
674 | 'year' => $year, |
---|
675 | 'yday' => floor($secsInYear/$_day_power), |
---|
676 | 'leap' => $leaf, |
---|
677 | 'ndays' => $ndays |
---|
678 | ); |
---|
679 | } |
---|
680 | |
---|
681 | |
---|
682 | $dow = adodb_dow($year,$month,$day); |
---|
683 | |
---|
684 | return array( |
---|
685 | 'seconds' => $secs, |
---|
686 | 'minutes' => $min, |
---|
687 | 'hours' => $hour, |
---|
688 | 'mday' => $day, |
---|
689 | 'wday' => $dow, |
---|
690 | 'mon' => $month, |
---|
691 | 'year' => $year, |
---|
692 | 'yday' => floor($secsInYear/$_day_power), |
---|
693 | 'weekday' => gmdate('l',$_day_power*(3+$dow)), |
---|
694 | 'month' => gmdate('F',mktime(0,0,0,$month,2,1971)), |
---|
695 | 0 => $origd |
---|
696 | ); |
---|
697 | } |
---|
698 | |
---|
699 | function adodb_gmdate($fmt,$d=false) |
---|
700 | { |
---|
701 | return adodb_date($fmt,$d,true); |
---|
702 | } |
---|
703 | |
---|
704 | // accepts unix timestamp and iso date format in $d |
---|
705 | function adodb_date2($fmt, $d=false, $is_gmt=false) |
---|
706 | { |
---|
707 | if ($d !== false) { |
---|
708 | if (!preg_match( |
---|
709 | "|^([0-9]{4})[-/\.]?([0-9]{1,2})[-/\.]?([0-9]{1,2})[ -]?(([0-9]{1,2}):?([0-9]{1,2}):?([0-9\.]{1,4}))?|", |
---|
710 | ($d), $rr)) return adodb_date($fmt,false,$is_gmt); |
---|
711 | |
---|
712 | if ($rr[1] <= 100 && $rr[2]<= 1) return adodb_date($fmt,false,$is_gmt); |
---|
713 | |
---|
714 | // h-m-s-MM-DD-YY |
---|
715 | if (!isset($rr[5])) $d = adodb_mktime(0,0,0,$rr[2],$rr[3],$rr[1]); |
---|
716 | else $d = @adodb_mktime($rr[5],$rr[6],$rr[7],$rr[2],$rr[3],$rr[1]); |
---|
717 | } |
---|
718 | |
---|
719 | return adodb_date($fmt,$d,$is_gmt); |
---|
720 | } |
---|
721 | |
---|
722 | |
---|
723 | /** |
---|
724 | Return formatted date based on timestamp $d |
---|
725 | */ |
---|
726 | function adodb_date($fmt,$d=false,$is_gmt=false) |
---|
727 | { |
---|
728 | static $daylight; |
---|
729 | |
---|
730 | if ($d === false) return ($is_gmt)? @gmdate($fmt): @date($fmt); |
---|
731 | if (!defined('ADODB_TEST_DATES')) { |
---|
732 | if ((abs($d) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range |
---|
733 | if (!defined('ADODB_NO_NEGATIVE_TS') || $d >= 0) // if windows, must be +ve integer |
---|
734 | return ($is_gmt)? @gmdate($fmt,$d): @date($fmt,$d); |
---|
735 | |
---|
736 | } |
---|
737 | } |
---|
738 | $_day_power = 86400; |
---|
739 | |
---|
740 | $arr = _adodb_getdate($d,true,$is_gmt); |
---|
741 | if (!isset($daylight)) $daylight = function_exists('adodb_daylight_sv'); |
---|
742 | if ($daylight) adodb_daylight_sv($arr, $is_gmt); |
---|
743 | |
---|
744 | $year = $arr['year']; |
---|
745 | $month = $arr['mon']; |
---|
746 | $day = $arr['mday']; |
---|
747 | $hour = $arr['hours']; |
---|
748 | $min = $arr['minutes']; |
---|
749 | $secs = $arr['seconds']; |
---|
750 | |
---|
751 | $max = strlen($fmt); |
---|
752 | $dates = ''; |
---|
753 | |
---|
754 | /* |
---|
755 | at this point, we have the following integer vars to manipulate: |
---|
756 | $year, $month, $day, $hour, $min, $secs |
---|
757 | */ |
---|
758 | for ($i=0; $i < $max; $i++) { |
---|
759 | switch($fmt[$i]) { |
---|
760 | case 'T': $dates .= date('T');break; |
---|
761 | // YEAR |
---|
762 | case 'L': $dates .= $arr['leap'] ? '1' : '0'; break; |
---|
763 | case 'r': // Thu, 21 Dec 2000 16:01:07 +0200 |
---|
764 | |
---|
765 | $dates .= gmdate('D',$_day_power*(3+adodb_dow($year,$month,$day))).', ' |
---|
766 | . ($day<10?' '.$day:$day) . ' '.date('M',mktime(0,0,0,$month,2,1971)).' '.$year.' '; |
---|
767 | |
---|
768 | if ($hour < 10) $dates .= '0'.$hour; else $dates .= $hour; |
---|
769 | |
---|
770 | if ($min < 10) $dates .= ':0'.$min; else $dates .= ':'.$min; |
---|
771 | |
---|
772 | if ($secs < 10) $dates .= ':0'.$secs; else $dates .= ':'.$secs; |
---|
773 | |
---|
774 | $gmt = adodb_get_gmt_diff(); |
---|
775 | $dates .= sprintf(' %s%04d',($gmt<0)?'+':'-',abs($gmt)/36); break; |
---|
776 | |
---|
777 | case 'Y': $dates .= $year; break; |
---|
778 | case 'y': $dates .= substr($year,strlen($year)-2,2); break; |
---|
779 | // MONTH |
---|
780 | case 'm': if ($month<10) $dates .= '0'.$month; else $dates .= $month; break; |
---|
781 | case 'Q': $dates .= ($month+3)>>2; break; |
---|
782 | case 'n': $dates .= $month; break; |
---|
783 | case 'M': $dates .= date('M',mktime(0,0,0,$month,2,1971)); break; |
---|
784 | case 'F': $dates .= date('F',mktime(0,0,0,$month,2,1971)); break; |
---|
785 | // DAY |
---|
786 | case 't': $dates .= $arr['ndays']; break; |
---|
787 | case 'z': $dates .= $arr['yday']; break; |
---|
788 | case 'w': $dates .= adodb_dow($year,$month,$day); break; |
---|
789 | case 'l': $dates .= gmdate('l',$_day_power*(3+adodb_dow($year,$month,$day))); break; |
---|
790 | case 'D': $dates .= gmdate('D',$_day_power*(3+adodb_dow($year,$month,$day))); break; |
---|
791 | case 'j': $dates .= $day; break; |
---|
792 | case 'd': if ($day<10) $dates .= '0'.$day; else $dates .= $day; break; |
---|
793 | case 'S': |
---|
794 | $d10 = $day % 10; |
---|
795 | if ($d10 == 1) $dates .= 'st'; |
---|
796 | else if ($d10 == 2) $dates .= 'nd'; |
---|
797 | else if ($d10 == 3) $dates .= 'rd'; |
---|
798 | else $dates .= 'th'; |
---|
799 | break; |
---|
800 | |
---|
801 | // HOUR |
---|
802 | case 'Z': |
---|
803 | $dates .= ($is_gmt) ? 0 : -adodb_get_gmt_diff(); break; |
---|
804 | case 'O': |
---|
805 | $gmt = ($is_gmt) ? 0 : adodb_get_gmt_diff(); |
---|
806 | $dates .= sprintf('%s%04d',($gmt<0)?'+':'-',abs($gmt)/36); break; |
---|
807 | |
---|
808 | case 'H': |
---|
809 | if ($hour < 10) $dates .= '0'.$hour; |
---|
810 | else $dates .= $hour; |
---|
811 | break; |
---|
812 | case 'h': |
---|
813 | if ($hour > 12) $hh = $hour - 12; |
---|
814 | else { |
---|
815 | if ($hour == 0) $hh = '12'; |
---|
816 | else $hh = $hour; |
---|
817 | } |
---|
818 | |
---|
819 | if ($hh < 10) $dates .= '0'.$hh; |
---|
820 | else $dates .= $hh; |
---|
821 | break; |
---|
822 | |
---|
823 | case 'G': |
---|
824 | $dates .= $hour; |
---|
825 | break; |
---|
826 | |
---|
827 | case 'g': |
---|
828 | if ($hour > 12) $hh = $hour - 12; |
---|
829 | else { |
---|
830 | if ($hour == 0) $hh = '12'; |
---|
831 | else $hh = $hour; |
---|
832 | } |
---|
833 | $dates .= $hh; |
---|
834 | break; |
---|
835 | // MINUTES |
---|
836 | case 'i': if ($min < 10) $dates .= '0'.$min; else $dates .= $min; break; |
---|
837 | // SECONDS |
---|
838 | case 'U': $dates .= $d; break; |
---|
839 | case 's': if ($secs < 10) $dates .= '0'.$secs; else $dates .= $secs; break; |
---|
840 | // AM/PM |
---|
841 | // Note 00:00 to 11:59 is AM, while 12:00 to 23:59 is PM |
---|
842 | case 'a': |
---|
843 | if ($hour>=12) $dates .= 'pm'; |
---|
844 | else $dates .= 'am'; |
---|
845 | break; |
---|
846 | case 'A': |
---|
847 | if ($hour>=12) $dates .= 'PM'; |
---|
848 | else $dates .= 'AM'; |
---|
849 | break; |
---|
850 | default: |
---|
851 | $dates .= $fmt[$i]; break; |
---|
852 | // ESCAPE |
---|
853 | case "\\": |
---|
854 | $i++; |
---|
855 | if ($i < $max) $dates .= $fmt[$i]; |
---|
856 | break; |
---|
857 | } |
---|
858 | } |
---|
859 | return $dates; |
---|
860 | } |
---|
861 | |
---|
862 | /** |
---|
863 | Returns a timestamp given a GMT/UTC time. |
---|
864 | Note that $is_dst is not implemented and is ignored. |
---|
865 | */ |
---|
866 | function adodb_gmmktime($hr,$min,$sec,$mon=false,$day=false,$year=false,$is_dst=false) |
---|
867 | { |
---|
868 | return adodb_mktime($hr,$min,$sec,$mon,$day,$year,$is_dst,true); |
---|
869 | } |
---|
870 | |
---|
871 | /** |
---|
872 | Return a timestamp given a local time. Originally by jackbbs. |
---|
873 | Note that $is_dst is not implemented and is ignored. |
---|
874 | |
---|
875 | Not a very fast algorithm - O(n) operation. Could be optimized to O(1). |
---|
876 | */ |
---|
877 | function adodb_mktime($hr,$min,$sec,$mon=false,$day=false,$year=false,$is_dst=false,$is_gmt=false) |
---|
878 | { |
---|
879 | if (!defined('ADODB_TEST_DATES')) { |
---|
880 | // for windows, we don't check 1970 because with timezone differences, |
---|
881 | // 1 Jan 1970 could generate negative timestamp, which is illegal |
---|
882 | if (1971 < $year && $year < 2038 |
---|
883 | || $mon === false |
---|
884 | || !defined('ADODB_NO_NEGATIVE_TS') && (1901 < $year && $year < 2038) |
---|
885 | ) |
---|
886 | return $is_gmt? |
---|
887 | @gmmktime($hr,$min,$sec,$mon,$day,$year): |
---|
888 | @mktime($hr,$min,$sec,$mon,$day,$year); |
---|
889 | } |
---|
890 | |
---|
891 | $gmt_different = ($is_gmt) ? 0 : adodb_get_gmt_diff(); |
---|
892 | |
---|
893 | $hr = intval($hr); |
---|
894 | $min = intval($min); |
---|
895 | $sec = intval($sec); |
---|
896 | $mon = intval($mon); |
---|
897 | $day = intval($day); |
---|
898 | $year = intval($year); |
---|
899 | |
---|
900 | |
---|
901 | $year = adodb_year_digit_check($year); |
---|
902 | |
---|
903 | if ($mon > 12) { |
---|
904 | $y = floor($mon / 12); |
---|
905 | $year += $y; |
---|
906 | $mon -= $y*12; |
---|
907 | } |
---|
908 | |
---|
909 | $_day_power = 86400; |
---|
910 | $_hour_power = 3600; |
---|
911 | $_min_power = 60; |
---|
912 | |
---|
913 | $_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31); |
---|
914 | $_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31); |
---|
915 | |
---|
916 | $_total_date = 0; |
---|
917 | if ($year >= 1970) { |
---|
918 | for ($a = 1970 ; $a <= $year; $a++) { |
---|
919 | $leaf = _adodb_is_leap_year($a); |
---|
920 | if ($leaf == true) { |
---|
921 | $loop_table = $_month_table_leaf; |
---|
922 | $_add_date = 366; |
---|
923 | } else { |
---|
924 | $loop_table = $_month_table_normal; |
---|
925 | $_add_date = 365; |
---|
926 | } |
---|
927 | if ($a < $year) { |
---|
928 | $_total_date += $_add_date; |
---|
929 | } else { |
---|
930 | for($b=1;$b<$mon;$b++) { |
---|
931 | $_total_date += $loop_table[$b]; |
---|
932 | } |
---|
933 | } |
---|
934 | } |
---|
935 | $_total_date +=$day-1; |
---|
936 | $ret = $_total_date * $_day_power + $hr * $_hour_power + $min * $_min_power + $sec + $gmt_different; |
---|
937 | |
---|
938 | } else { |
---|
939 | for ($a = 1969 ; $a >= $year; $a--) { |
---|
940 | $leaf = _adodb_is_leap_year($a); |
---|
941 | if ($leaf == true) { |
---|
942 | $loop_table = $_month_table_leaf; |
---|
943 | $_add_date = 366; |
---|
944 | } else { |
---|
945 | $loop_table = $_month_table_normal; |
---|
946 | $_add_date = 365; |
---|
947 | } |
---|
948 | if ($a > $year) { $_total_date += $_add_date; |
---|
949 | } else { |
---|
950 | for($b=12;$b>$mon;$b--) { |
---|
951 | $_total_date += $loop_table[$b]; |
---|
952 | } |
---|
953 | } |
---|
954 | } |
---|
955 | $_total_date += $loop_table[$mon] - $day; |
---|
956 | |
---|
957 | $_day_time = $hr * $_hour_power + $min * $_min_power + $sec; |
---|
958 | $_day_time = $_day_power - $_day_time; |
---|
959 | $ret = -( $_total_date * $_day_power + $_day_time - $gmt_different); |
---|
960 | if ($ret < -12220185600) $ret += 10*86400; // if earlier than 5 Oct 1582 - gregorian correction |
---|
961 | else if ($ret < -12219321600) $ret = -12219321600; // if in limbo, reset to 15 Oct 1582. |
---|
962 | } |
---|
963 | //print " dmy=$day/$mon/$year $hr:$min:$sec => " .$ret; |
---|
964 | return $ret; |
---|
965 | } |
---|
966 | |
---|
967 | ?> |
---|