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 $invert_time;
  22
  23     /* date couldn't be parsed */
  24     if ($stamp == -1) {
  25         return -1;
  26     }
  27
  28     switch($gmt)
  29     {
  30         case 'Pacific':
  31         case 'PST':
  32             $gmt = '-0800';
  33             break;
  34         case 'Mountain':
  35         case 'MST':
  36         case 'PDT':
  37             $gmt = '-0700';
  38             break;
  39         case 'Central':
  40         case 'CST':
  41         case 'MDT':
  42             $gmt = '-0600';
  43             break;
  44         case 'Eastern':
  45         case 'EST':
  46         case 'CDT':
  47             $gmt = '-0500';
  48             break;
  49         case 'EDT':
  50             $gmt = '-0400';
  51             break;
  52         case 'GMT':
  53             $gmt = '+0000';
  54             break;
  55         case 'BST':
  56         case 'MET':
  57             $gmt = '+0100';
  58         case 'EET':
  59         case 'IST':
  60         case 'MET DST':
  61         case 'METDST':
  62             $gmt = '+0200';
  63             break;
  64         case 'HKT':
  65             $gmt = '+0800';
  66             break;
  67         case 'JST':
  68         case 'KST':
  69             $gmt = '+0900';
  70             break;
  71             break;
  72     }
  73
  74     if (substr($gmt, 0, 1) == '-') {
  75         $neg = true;
  76         $gmt = substr($gmt, 1, strlen($gmt));
  77     } else if (substr($gmt, 0, 1) == '+') {
  78         $neg = false;
  79         $gmt = substr($gmt, 1, strlen($gmt));
  80     } else {
  81         $neg = false;
  82     }
  83
  84     $difference = substr($gmt, 2, 2);
  85     $gmt = substr($gmt, 0, 2);
  86     $gmt = ($gmt + ($difference / 60)) * 3600;
  87     if ($neg) {
  88         $gmt = "-$gmt";
  89     } else {
  90         $gmt = "+$gmt";
  91     }
  92
  93     /** now find what the server is at **/
  94     $current = date('Z', time());
  95     if ($invert_time) {
  96         $current = - $current;
  97     }
  98     $stamp = (int)$stamp - (int)$gmt + (int)$current;
  99
 100     return $stamp;
 101 }
 102
 103 /**
 104   Switch system has been intentionaly chosen for the
 105   internationalization of month and day names. The reason
 106   is to make sure that _("") strings will go into the
 107   main po.
 108 **/
 109
 110 function getDayName( $day_number ) {
 111
 112     switch( $day_number ) {
 113     case 0:
 114         $ret = _("Sunday");
 115         break;
 116     case 1:
 117         $ret = _("Monday");
 118         break;
 119     case 2:
 120         $ret = _("Tuesday");
 121         break;
 122     case 3:
 123         $ret = _("Wednesday");
 124         break;
 125     case 4:
 126         $ret = _("Thursday");
 127         break;
 128     case 5:
 129         $ret = _("Friday");
 130         break;
 131     case 6:
 132         $ret = _("Saturday");
 133         break;
 134     default:
 135         $ret = '';
 136     }
 137     return( $ret );
 138 }
 139
 140 function getMonthName( $month_number ) {
 141     switch( $month_number ) {
 142      case '01':
 143         $ret = _("January");
 144         break;
 145      case '02':
 146         $ret = _("February");
 147         break;
 148      case '03':
 149         $ret = _("March");
 150         break;
 151      case '04':
 152         $ret = _("April");
 153         break;
 154      case '05':
 155         $ret = _("May");
 156         break;
 157      case '06':
 158         $ret = _("June");
 159         break;
 160      case '07':
 161         $ret = _("July");
 162         break;
 163      case '08':
 164         $ret = _("August");
 165         break;
 166      case '09':
 167         $ret = _("September");
 168         break;
 169      case '10':
 170         $ret = _("October");
 171         break;
 172      case '11':
 173         $ret = _("November");
 174         break;
 175      case '12':
 176         $ret = _("December");
 177         break;
 178      default:
 179         $ret = '';
 180     }
 181     return( $ret );
 182 }
 183
 184 function date_intl( $date_format, $stamp ) {
 185
 186     $ret = str_replace( 'D', '$1', $date_format );
 187     $ret = str_replace( 'F', '$2', $ret );
 188     $ret = str_replace( 'l', '$4', $ret );
 189     $ret = str_replace( 'M', '$5', $ret );
 190     $ret = date( '$3'. $ret . '$3', $stamp ); // Workaround for a PHP 4.0.4 problem
 191     $ret = str_replace( '$1', substr( getDayName( date( 'w', $stamp ) ), 0, 3 ), $ret );
 192     $ret = str_replace( '$5', substr( getMonthName( date( 'm', $stamp ) ), 0, 3 ), $ret );
 193     $ret = str_replace( '$2', getMonthName( date( 'm', $stamp ) ), $ret );
 194     $ret = str_replace( '$4', getDayName( date( 'w', $stamp ) ), $ret );
 195     $ret = str_replace( '$3', '', $ret );
 196
 197     return( $ret );
 198 }
 199
 200 function getLongDateString( $stamp ) {
 201
 202     global $hour_format;
 203
 204     if ($stamp == -1) {
 205         return '';
 206     }
 207
 208     if ( $hour_format == SMPREF_TIME_12HR ) {
 209         $date_format = _("D, F j, Y g:i a");
 210     } else {
 211         $date_format = _("D, F j, Y G:i");
 212     }
 213
 214     return( date_intl( $date_format, $stamp ) );
 215
 216 }
 217
 218 function getDateString( $stamp ) {
 219
 220     global $invert_time, $hour_format;
 221
 222     if ( $stamp == -1 ) {
 223        return '';
 224     }
 225
 226     $now = time();
 227
 228     $dateZ = date('Z', $now );
 229     if ($invert_time) {
 230         $dateZ = - $dateZ;
 231     }
 232     $midnight = $now - ($now % 86400) - $dateZ;
 233
 234     if ($midnight < $stamp) {
 235         /* Today */
 236         if ( $hour_format == SMPREF_TIME_12HR ) {
 237             $date_format = _("g:i a");
 238         } else {
 239             $date_format = _("G:i");
 240         }
 241     } else if ($midnight - 518400 < $stamp) {
 242         /* This week */
 243         if ( $hour_format == SMPREF_TIME_12HR ) {
 244             $date_format = _("D, g:i a");
 245         } else {
 246             $date_format = _("D, G:i");
 247         }
 248     } else {
 249         /* before this week */
 250         $date_format = _("M j, Y");
 251     }
 252
 253     return( date_intl( $date_format, $stamp ) );
 254 }
 255
 256 function getTimeStamp($dateParts) {
 257     /** $dateParts[0] == <day of week>   Mon, Tue, Wed
 258     ** $dateParts[1] == <day of month>  23
 259     ** $dateParts[2] == <month>         Jan, Feb, Mar
 260     ** $dateParts[3] == <year>          1999
 261     ** $dateParts[4] == <time>          18:54:23 (HH:MM:SS)
 262     ** $dateParts[5] == <from GMT>      +0100
 263     ** $dateParts[6] == <zone>          (EDT)
 264     **
 265     ** NOTE:  In RFC 822, it states that <day of week> is optional.
 266     **        In that case, dateParts[0] would be the <day of month>
 267     **        and everything would be bumped up one.
 268     **/
 269
 270     /*
 271      * Simply check to see if the first element in the dateParts
 272      * array is an integer or not.
 273      * Since the day of week is optional, this check is needed.
 274      */
 275
 276     $string = implode (' ', $dateParts);
 277
 278     if (! isset($dateParts[4])) {
 279         $dateParts[4] = '';
 280     }
 281     if (! isset($dateParts[5])) {
 282         $dateParts[5] = '';
 283     }
 284
 285     if (intval(trim($dateParts[0])) > 0) {
 286         return getGMTSeconds(strtotime($string), $dateParts[4]);
 287     }
 288
 289     return getGMTSeconds(strtotime($string), $dateParts[5]);
 290 }
 291
 292 /* I use this function for profiling. Should never be called in
 293    actual versions of squirrelmail released to public. */
 294 /*
 295    function getmicrotime() {
 296       $mtime = microtime();
 297       $mtime = explode(' ',$mtime);
 298       $mtime = $mtime[1] + $mtime[0];
 299       return ($mtime);
 300    }
 301 */
 302 ?>