[6731] | 1 | <?php |
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| 2 | /* |
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| 3 | * --:: JPEG MetaDatas ::------------------------------------------------------- |
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| 4 | * |
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| 5 | * Author : Grum |
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| 6 | * email : grum at piwigo.org |
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| 7 | * website : http://photos.grum.fr |
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| 8 | * |
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| 9 | * << May the Little SpaceFrog be with you ! >> |
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| 10 | * |
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| 11 | * +-----------------------------------------------------------------------+ |
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| 12 | * | JpegMetaData - a PHP based Jpeg Metadata manager | |
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| 13 | * +-----------------------------------------------------------------------+ |
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| 14 | * | Copyright(C) 2010 Grum - http://www.grum.fr | |
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| 15 | * +-----------------------------------------------------------------------+ |
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| 16 | * | This program is free software; you can redistribute it and/or modify | |
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| 17 | * | it under the terms of the GNU General Public License as published by | |
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| 18 | * | the Free Software Foundation | |
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| 19 | * | | |
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| 20 | * | This program is distributed in the hope that it will be useful, but | |
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| 21 | * | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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| 22 | * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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| 23 | * | General Public License for more details. | |
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| 24 | * | | |
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| 25 | * | You should have received a copy of the GNU General Public License | |
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| 26 | * | along with this program; if not, write to the Free Software | |
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| 27 | * | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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| 28 | * | USA. | |
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| 29 | * +-----------------------------------------------------------------------+ |
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| 30 | * |
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| 31 | * |
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| 32 | * ----------------------------------------------------------------------------- |
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| 33 | * |
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| 34 | * This DateTime class is used if the PHP version don't have built-in DateTime |
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| 35 | * class |
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| 36 | * |
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| 37 | * Only the needed methods are provided : |
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| 38 | * - public function __construct($time, $timeZone=null) |
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| 39 | * - public function format($fmt) |
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| 40 | * |
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| 41 | * ----------------------------------------------------------------------------- |
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| 42 | */ |
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| 43 | |
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| 44 | if(!class_exists('DateTime')) |
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| 45 | { |
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| 46 | Class DateTimeZone |
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| 47 | { |
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| 48 | private $timeZone='UTC'; |
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| 49 | private $pushedTZ='UTC'; |
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| 50 | |
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| 51 | public function __construct($value='UTC') |
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| 52 | { |
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| 53 | $this->set($value); |
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| 54 | } |
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| 55 | |
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| 56 | /** |
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| 57 | * return the time zone |
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| 58 | */ |
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| 59 | public function get() |
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| 60 | { |
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| 61 | return($this->timeZone); |
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| 62 | } |
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| 63 | |
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| 64 | /** |
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| 65 | * set the time zone |
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| 66 | */ |
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| 67 | public function set($timeZone) |
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| 68 | { |
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| 69 | if(is_string($timeZone)) |
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| 70 | { |
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| 71 | $this->timeZone=$timeZone; |
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| 72 | } |
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| 73 | } |
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| 74 | |
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| 75 | /** |
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| 76 | * apply the time zone to the system |
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| 77 | */ |
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| 78 | public function push() |
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| 79 | { |
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| 80 | if(function_exists('date_default_timezone_get')) |
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| 81 | { |
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| 82 | $this->pushed=date_default_timezone_get(); |
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| 83 | date_default_timezone_set($this->timeZone); |
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| 84 | } |
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| 85 | } |
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| 86 | |
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| 87 | /** |
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| 88 | * restore the previous system time zone |
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| 89 | */ |
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| 90 | public function pop() |
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| 91 | { |
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| 92 | if(function_exists('date_default_timezone_set')) |
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| 93 | { |
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| 94 | $this->pushed=date_default_timezone_set($this->pushed); |
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| 95 | } |
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| 96 | } |
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| 97 | } |
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| 98 | |
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| 99 | |
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| 100 | class DateTime |
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| 101 | { |
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| 102 | private $time=0; |
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| 103 | private $timeZone=null; |
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| 104 | |
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| 105 | public function __construct($time=null, DateTimeZone $timeZone=null) |
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| 106 | { |
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| 107 | if(is_string($time)) |
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| 108 | { |
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| 109 | /* |
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| 110 | * try to parse the string ; assume the current date/time if provided |
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| 111 | * string can't be interpreted |
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| 112 | */ |
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| 113 | $this->time=strtotime($time); |
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| 114 | if($this->time===false) $this->time=time(); |
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| 115 | } |
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| 116 | elseif(is_numeric($time)) |
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| 117 | { |
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| 118 | // a timestamp was given |
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| 119 | $this->time=$time; |
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| 120 | } |
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| 121 | else |
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| 122 | { |
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| 123 | // in all other case, assume it's equal to the current date/time |
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| 124 | $this->time=time(); |
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| 125 | } |
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| 126 | $this->timeZone=$timeZone; |
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| 127 | } |
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| 128 | |
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| 129 | public function __destruct() |
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| 130 | { |
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| 131 | } |
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| 132 | |
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| 133 | /** |
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| 134 | * returns the date/time in the given time zone |
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| 135 | */ |
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| 136 | public function format($fmt='c') |
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| 137 | { |
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| 138 | if(!is_null($this->timeZone)) $this->timeZone->push(); |
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| 139 | $returned=date($fmt, $this->time); |
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| 140 | if(!is_null($this->timeZone)) $this->timeZone->pop(); |
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| 141 | return($returned); |
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| 142 | } |
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| 143 | } |
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| 144 | } |
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| 145 | |
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| 146 | ?> |
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