functions/date.php

   1 <?php
   2
   3 /**
   4  * date.php
   5  *
   6  * Copyright (c) 1999-2002 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * Takes a date and parses it into a usable format.  The form that a
  10  * date SHOULD arrive in is:
  11  *       <Tue,> 29 Jun 1999 09:52:11 -0500 (EDT)
  12  * (as specified in RFC 822) -- 'Tue' is optional
  13  *
  14  * $Id$
  15  */
  16
  17 require_once( '../functions/constants.php' );
  18
  19 // corrects a time stamp to be the local time
  20 function getGMTSeconds($stamp, $gmt) {
  21     global $invert_time;
  22     if (($gmt == 'Pacific') || ($gmt == 'PST')) {
  23         $gmt = '-0800';
  24     } else if (($gmt == 'EDT')) {
  25         $gmt = '-0400';
  26     } else if (($gmt == 'Eastern') || ($gmt == 'EST') || ($gmt == 'CDT')) {
  27         $gmt = '-0500';
  28     } else if (($gmt == 'Central') || ($gmt == 'CST') || ($gmt == 'MDT')) {
  29         $gmt = '-0600';
  30     } else if (($gmt == 'Mountain') || ($gmt == 'MST') || ($gmt == 'PDT')) {
  31         $gmt = '-0700';
  32     } else if ($gmt == 'BST') {
  33         $gmt = '+0100';
  34     } else if ($gmt == 'EET') {
  35         $gmt = '+0200';
  36     } else if ($gmt == 'GMT') {
  37         $gmt = '+0000';
  38     } else if ($gmt == 'HKT') {
  39         $gmt = '+0800';
  40     } else if ($gmt == 'IST') {
  41         $gmt = '+0200';
  42     } else if ($gmt == 'JST') {
  43         $gmt = '+0900';
  44     } else if ($gmt == 'KST') {
  45         $gmt = "+0900";
  46     } else if ($gmt == 'MET') {
  47         $gmt = '+0100';
  48     } else if ($gmt == 'MET DST' || $gmt == 'METDST') {
  49         $gmt = '+0200';
  50     }
  51
  52     if (substr($gmt, 0, 1) == '-') {
  53         $neg = true;
  54         $gmt = substr($gmt, 1, strlen($gmt));
  55     } else if (substr($gmt, 0, 1) == '+') {
  56         $neg = false;
  57         $gmt = substr($gmt, 1, strlen($gmt));
  58     } else {
  59         $neg = false;
  60     }
  61
  62     $difference = substr($gmt, 2, 2);
  63     $gmt = substr($gmt, 0, 2);
  64     $gmt = ($gmt + ($difference / 60)) * 3600;
  65     if ($neg == true) {
  66         $gmt = "-$gmt";
  67     } else {
  68         $gmt = "+$gmt";
  69     }
  70
  71     /** now find what the server is at **/
  72     $current = date('Z', time());
  73     if ($invert_time) {
  74         $current = - $current;
  75     }
  76     $stamp = (int)$stamp - (int)$gmt + (int)$current;
  77
  78     return $stamp;
  79 }
  80
  81 /**
  82   Switch system has been intentionaly choosed for the
  83   internationalization of month and day names. The reason
  84   is to make sure that _("") strings will go into the
  85   main po.
  86 **/
  87
  88 function getDayName( $day_number ) {
  89
  90     switch( $day_number ) {
  91     case 0:
  92         $ret = _("Sunday");
  93         break;
  94     case 1:
  95         $ret = _("Monday");
  96         break;
  97     case 2:
  98         $ret = _("Tuesday");
  99         break;
 100     case 3:
 101         $ret = _("Wednesday");
 102         break;
 103     case 4:
 104         $ret = _("Thursday");
 105         break;
 106     case 5:
 107         $ret = _("Friday");
 108         break;
 109     case 6:
 110         $ret = _("Saturday");
 111         break;
 112     default:
 113         $ret = '';
 114     }
 115     return( $ret );
 116 }
 117
 118 function getMonthName( $month_number ) {
 119     switch( $month_number ) {
 120      case '01':
 121         $ret = _("January");
 122         break;
 123      case '02':
 124         $ret = _("February");
 125         break;
 126      case '03':
 127         $ret = _("March");
 128         break;
 129      case '04':
 130         $ret = _("April");
 131         break;
 132      case '05':
 133         $ret = _("May");
 134         break;
 135      case '06':
 136         $ret = _("June");
 137         break;
 138      case '07':
 139         $ret = _("July");
 140         break;
 141      case '08':
 142         $ret = _("August");
 143         break;
 144      case '09':
 145         $ret = _("September");
 146         break;
 147      case '10':
 148         $ret = _("October");
 149         break;
 150      case '11':
 151         $ret = _("November");
 152         break;
 153      case '12':
 154         $ret = _("December");
 155         break;
 156      default:
 157         $ret = '';
 158     }
 159     return( $ret );
 160 }
 161
 162 function date_intl( $date_format, $stamp ) {
 163
 164     $ret = str_replace( 'D', '$1', $date_format );
 165     $ret = str_replace( 'F', '$2', $ret );
 166     $ret = str_replace( 'l', '$4', $ret );
 167     $ret = str_replace( 'M', '$5', $ret );
 168     $ret = date( '$3'. $ret . '$3', $stamp ); // Workaround for a PHP 4.0.4 problem
 169     $ret = str_replace( '$1', substr( getDayName( date( 'w', $stamp ) ), 0, 3 ), $ret );
 170     $ret = str_replace( '$5', substr( getMonthName( date( 'm', $stamp ) ), 0, 3 ), $ret );
 171     $ret = str_replace( '$2', getMonthName( date( 'm', $stamp ) ), $ret );
 172     $ret = str_replace( '$4', getDayName( date( 'w', $stamp ) ), $ret );
 173     $ret = str_replace( '$3', '', $ret );
 174
 175     return( $ret );
 176 }
 177
 178 function getLongDateString( $stamp ) {
 179
 180     global $hour_format;
 181
 182     if ( $hour_format == SMPREF_TIME_12HR ) {
 183         $date_format = _("D, F j, Y g:i a");
 184     } else {
 185         $date_format = _("D, F j, Y G:i");
 186     }
 187
 188     return( date_intl( $date_format, $stamp ) );
 189
 190 }
 191
 192 function getDateString( $stamp ) {
 193
 194     global $invert_time, $hour_format;
 195
 196     $now = time();
 197
 198     $dateZ = date('Z', $now );
 199     if ($invert_time) {
 200         $dateZ = - $dateZ;
 201     }
 202     $midnight = $now - ($now % 86400) - $dateZ;
 203
 204     if ($midnight < $stamp) {
 205         /* Today */
 206         if ( $hour_format == SMPREF_TIME_12HR ) {
 207             $date_format = _("g:i a");
 208         } else {
 209             $date_format = _("G:i");
 210         }
 211     } else if ($midnight - 518400 < $stamp) {
 212         /* This week */
 213         if ( $hour_format == SMPREF_TIME_12HR ) {
 214             $date_format = _("D, g:i a");
 215         } else {
 216             $date_format = _("D, G:i");
 217         }
 218     } else {
 219         /* before this week */
 220         $date_format = _("M j, Y");
 221     }
 222
 223     return( date_intl( $date_format, $stamp ) );
 224 }
 225
 226 function getTimeStamp($dateParts) {
 227     /** $dateParts[0] == <day of week>   Mon, Tue, Wed
 228     ** $dateParts[1] == <day of month>  23
 229     ** $dateParts[2] == <month>         Jan, Feb, Mar
 230     ** $dateParts[3] == <year>          1999
 231     ** $dateParts[4] == <time>          18:54:23 (HH:MM:SS)
 232     ** $dateParts[5] == <from GMT>      +0100
 233     ** $dateParts[6] == <zone>          (EDT)
 234     **
 235     ** NOTE:  In RFC 822, it states that <day of week> is optional.
 236     **        In that case, dateParts[0] would be the <day of month>
 237     **        and everything would be bumped up one.
 238     **/
 239
 240     /*
 241      * Simply check to see if the first element in the dateParts
 242      * array is an integer or not.
 243      *    Since the day of week is optional, this check is needed.
 244      *
 245      *    The old code used eregi('mon|tue|wed|thu|fri|sat|sun',
 246      *    $dateParts[0], $tmp) to find if the first element was the
 247      *    day of week or day of month. This is an expensive call
 248      *    (processing time) to have inside a loop. Doing it this way
 249      *    saves quite a bit of time for large mailboxes.
 250      *
 251      *    It is also quicker to call explode only once rather than
 252      *    the 3 times it was getting called by calling the functions
 253      *    getHour, getMinute, and getSecond.
 254      */
 255
 256     if (! isset($dateParts[1])) {
 257         $dateParts[1] = '';
 258     }
 259     if (! isset($dateParts[2])) {
 260         $dateParts[2] = '';
 261     }
 262     if (! isset($dateParts[3])) {
 263         $dateParts[3] = '';
 264     }
 265     if (! isset($dateParts[4])) {
 266         $dateParts[4] = '';
 267     }
 268     if (! isset($dateParts[5])) {
 269         $dateParts[5] = '';
 270     }
 271     if (intval(trim($dateParts[0])) > 0) {
 272         $string = $dateParts[0] . ' ' . $dateParts[1] . ' ' .
 273                   $dateParts[2] . ' ' . $dateParts[3];
 274         return getGMTSeconds(strtotime($string), $dateParts[4]);
 275     }
 276     $string = $dateParts[0] . ' ' . $dateParts[1] . ' ' .
 277             $dateParts[2] . ' ' . $dateParts[3] . ' ' . $dateParts[4];
 278     if (isset($dateParts[5])) {
 279         return getGMTSeconds(strtotime($string), $dateParts[5]);
 280     } else {
 281         return getGMTSeconds(strtotime($string), '');
 282     }
 283 }
 284
 285 /* I use this function for profiling. Should never be called in
 286    actual versions of squirrelmail released to public. */
 287 /*
 288    function getmicrotime() {
 289       $mtime = microtime();
 290       $mtime = explode(' ',$mtime);
 291       $mtime = $mtime[1] + $mtime[0];
 292       return ($mtime);
 293    }
 294 */
 295 ?>