[squirrelmail.git] / functions / date.php

<?php

/**
 * date.php
 *
 * Copyright (c) 1999-2005 The SquirrelMail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * Takes a date and parses it into a usable format.  The form that a
 * date SHOULD arrive in is:
 *       <Tue,> 29 Jun 1999 09:52:11 -0500 (EDT)
 * (as specified in RFC 822) -- 'Tue' is optional
 *
 * @version $Id$
 * @package squirrelmail
 * @subpackage date
 */

/** Load up some useful constants */
require_once(SM_PATH . 'functions/constants.php');

/**
 * Corrects a time stamp to be the local time.
 *
 * @param int stamp the timestamp to adjust
 * @param string tzc the timezone correction
 * @return int the corrected timestamp
 */
function getGMTSeconds($stamp, $tzc) {
    /* date couldn't be parsed */
    if ($stamp == -1) {
        return -1;
    }
    /* timezone correction, expressed as `shhmm' */
    switch($tzc)
    {
        case 'Pacific':
        case 'PST':
            $tzc = '-0800';
            break;
        case 'Mountain':
        case 'MST':
        case 'PDT':
            $tzc = '-0700';
            break;
        case 'Central':
        case 'CST':
        case 'MDT':
            $tzc = '-0600';
            break;
        case 'Eastern':
        case 'EST':
        case 'CDT':
            $tzc = '-0500';
            break;
        case 'EDT':
            $tzc = '-0400';
            break;
        case 'GMT':
            $tzc = '+0000';
            break;
        case 'BST':
        case 'MET':
        case 'CET':
            $tzc = '+0100';
            break;
        case 'EET':
        case 'IST':
        case 'MET DST':
        case 'METDST':
            $tzc = '+0200';
            break;
        case 'HKT':
            $tzc = '+0800';
            break;
        case 'JST':
        case 'KST':
            $tzc = '+0900';
            break;
    }
    $neg = false;
    if (substr($tzc, 0, 1) == '-') {
        $neg = true;
    } else if (substr($tzc, 0, 1) != '+') {
        $tzc = '+'.$tzc;
    }
    $hh = substr($tzc,1,2);
    $mm = substr($tzc,3,2);
    $iTzc = ($hh * 60 + $mm) * 60;
    if ($neg) $iTzc = -1 * (int) $iTzc;
    /* stamp in gmt */
    $stamp -= $iTzc;
    /** now find what the server is at **/
    $current = date('Z', time());
    /* stamp in local timezone */
    $stamp += $current;

    return $stamp;
}

/**
 * Returns the (localized) string for a given day number.
 * Switch system has been intentionaly chosen for the
 * internationalization of month and day names. The reason
 * is to make sure that _("") strings will go into the
 * main po.
 *
 * @param int day_number the day number
 * @return string the day in human readable form
 */
function getDayName( $day_number ) {

    switch( $day_number ) {
    case 0:
        $ret = _("Sunday");
        break;
    case 1:
        $ret = _("Monday");
        break;
    case 2:
        $ret = _("Tuesday");
        break;
    case 3:
        $ret = _("Wednesday");
        break;
    case 4:
        $ret = _("Thursday");
        break;
    case 5:
        $ret = _("Friday");
        break;
    case 6:
        $ret = _("Saturday");
        break;
    default:
        $ret = '';
    }
    return( $ret );
}

/**
 * Like getDayName, but returns the short form
 * @param int day_number the day number
 * @return string the day in short human readable form
 */
function getDayAbrv( $day_number ) {

    switch( $day_number ) {
    case 0:
        $ret = _("Sun");
        break;
    case 1:
        $ret = _("Mon");
        break;
    case 2:
        $ret = _("Tue");
        break;
    case 3:
        $ret = _("Wed");
        break;
    case 4:
        $ret = _("Thu");
        break;
    case 5:
        $ret = _("Fri");
        break;
    case 6:
        $ret = _("Sat");
        break;
    default:
        $ret = '';
    }
    return( $ret );
}


/**
 * Returns the (localized) string for a given month number.
 *
 * @param string month_number the month number (01..12)
 * @return string the month name in human readable form
 */
function getMonthName( $month_number ) {
    switch( $month_number ) {
     case '01':
        $ret = _("January");
        break;
     case '02':
        $ret = _("February");
        break;
     case '03':
        $ret = _("March");
        break;
     case '04':
        $ret = _("April");
        break;
     case '05':
        $ret = _("May");
        break;
     case '06':
        $ret = _("June");
        break;
     case '07':
        $ret = _("July");
        break;
     case '08':
        $ret = _("August");
        break;
     case '09':
        $ret = _("September");
        break;
     case '10':
        $ret = _("October");
        break;
     case '11':
        $ret = _("November");
        break;
     case '12':
        $ret = _("December");
        break;
     default:
        $ret = '';
    }
    return( $ret );
}

/**
 * Returns the (localized) string for a given month number,
 * short representation.
 *
 * @param string month_number the month number (01..12)
 * @return string the shortened month in human readable form
 */
function getMonthAbrv( $month_number ) {
    switch( $month_number ) {
     case '01':
        $ret = _("Jan");
        break;
     case '02':
        $ret = _("Feb");
        break;
     case '03':
        $ret = _("Mar");
        break;
     case '04':
        $ret = _("Apr");
        break;
     case '05':
        $ret = _("Ma&#121;");
        break;
     case '06':
        $ret = _("Jun");
        break;
     case '07':
        $ret = _("Jul");
        break;
     case '08':
        $ret = _("Aug");
        break;
     case '09':
        $ret = _("Sep");
        break;
     case '10':
        $ret = _("Oct");
        break;
     case '11':
        $ret = _("Nov");
        break;
     case '12':
        $ret = _("Dec");
        break;
     default:
        $ret = '';
    }
    return( $ret );
}

/**
 * Returns the localized representation of the date/time.
 *
 * @param string date_format The format for the date, like the input for the PHP date() function.
 * @param int stamp the timestamp to convert
 * @return string a full date representation
 */
function date_intl( $date_format, $stamp ) {
    $ret = str_replace( array('D','F','l','M'), array('$1','$2','$3','$4'), $date_format );
    // to reduce the date calls we retrieve m and w in the same call
    $ret = date('w#m#'. $ret, $stamp );
    // extract day and month in order to replace later by intl day and month
    $aParts = explode('#',$ret);
    $ret = str_replace(array('$1','$4','$2','$3',), array(getDayAbrv($aParts[0]),
                                                          getMonthAbrv($aParts[1]),
                                                          getMonthName($aParts[1]),
                                                          getDayName($aParts[0])),
                                                          $aParts[2]);
    return( $ret );
}

/**
 * This returns a date of the format "Wed, Oct 29, 2003 9:52 am",
 * or the same in 24H format (depending on the user's settings),
 * and taking localization into accout.
 *
 * @param int stamp the timestamp
 * @return string the long date string
 */
function getLongDateString( $stamp ) {

    global $hour_format;

    if ($stamp == -1) {
        return '';
    }

    if ( $hour_format == SMPREF_TIME_12HR ) {
        $date_format = _("D, F j, Y g:i a");
    } else {
        $date_format = _("D, F j, Y H:i");
    }

    return( date_intl( $date_format, $stamp ) );

}

/**
 * Returns a short representation of the date,
 * taking timezones and localization into account.
 * Depending on user's settings, this string can be
 * of the form: "14:23" or "Jun 14, 2003" depending
 * on whether the stamp is "today" or not.
 *
 * @param int stamp the timestamp
 * @return string the date string
 */
function getDateString( $stamp ) {

    global $invert_time, $hour_format, $show_full_date;

    if ( $stamp == -1 ) {
       return '';
    }

    $now = time();

    $dateZ = date('Z', $now );

    // FIXME: isn't this obsolete and introduced as a terrible workaround
    // for bugs at other places which are fixed a long time ago?
    if ($invert_time) {
        $dateZ = - $dateZ;
    }

    // calculate when it was midnight and when it will be,
    // in order to display dates differently if they're 'today'
    $midnight = $now - ($now % 86400) - $dateZ;
    // this is to correct if after calculations midnight is more than
    // one whole day away.
    if ($now - $midnight > 86400) {
        $midnight += 86400;
    }
    $nextmid = $midnight + 86400;

    if (($show_full_date == 1) || ($nextmid < $stamp)) {
        $date_format = _("M j, Y");
    } else if ($midnight < $stamp) {
        /* Today */
        if ( $hour_format == SMPREF_TIME_12HR ) {
            $date_format = _("g:i a");
        } else {
            $date_format = _("H:i");
        }
    } else if ($midnight - 518400 < $stamp) {
        /* This week */
        if ( $hour_format == SMPREF_TIME_12HR ) {
            $date_format = _("D, g:i a");
        } else {
            $date_format = _("D, H:i");
        }
    } else {
        /* before this week */
        $date_format = _("M j, Y");
    }

    return( date_intl( $date_format, $stamp ) );
}

/**
 * Decodes a RFC 822 Date-header into a timestamp
 *
 * @param array dateParts the Date-header split by whitespace
 * @return int the timestamp calculated from the header
 */
function getTimeStamp($dateParts) {
    /** $dateParts[0] == <day of week>   Mon, Tue, Wed
    ** $dateParts[1] == <day of month>  23
    ** $dateParts[2] == <month>         Jan, Feb, Mar
    ** $dateParts[3] == <year>          1999
    ** $dateParts[4] == <time>          18:54:23 (HH:MM:SS)
    ** $dateParts[5] == <from GMT>      +0100
    ** $dateParts[6] == <zone>          (EDT)
    **
    ** NOTE:  In RFC 822, it states that <day of week> is optional.
    **        In that case, dateParts[0] would be the <day of month>
    **        and everything would be bumped up one.
    **/

    /*
     * Simply check to see if the first element in the dateParts
     * array is an integer or not.
     * Since the day of week is optional, this check is needed.
     */
     if (count($dateParts) <2) {
        return -1;
     } else if (count($dateParts) ==3) {
        if (substr_count($dateParts[0],'-') == 2 &&
            substr_count($dateParts[1],':') == 2) {
            //  dd-Month-yyyy 23:19:05 +0200
            //  redefine the date
            $aDate = explode('-',$dateParts[0]);
            $newDate = array($aDate[0],$aDate[1],$aDate[2],$dateParts[1],$dateParts[2]);
            $dateParts = $newDate;
        }
     }

    /* remove day of week */
    if (!is_numeric(trim($dateParts[0]))) {
        $dataParts = array_shift($dateParts);
    }
    /* calculate timestamp separated from the zone and obs-zone */
    $stamp = strtotime(implode (' ', array_splice ($dateParts,0,4)));
    if (!isset($dateParts[0])) {
        $dateParts[0] = '+0000';
    }

    if (!preg_match('/^[+-]{1}[0-9]{4}$/',$dateParts[0])) {
        /* zone in obs-zone format */
        if (preg_match('/\((.+)\)/',$dateParts[0],$regs)) {
            $obs_zone = $regs[1];
        } else {
            $obs_zone = $dateParts[0];
        }
        return getGMTSeconds($stamp, $obs_zone);
    } else {
        return getGMTSeconds($stamp, $dateParts[0]);
    }
}

/* I use this function for profiling. Should never be called in
   actual versions of SquirrelMail released to public. */
/*
   function getmicrotime() {
      $mtime = microtime();
      $mtime = explode(' ',$mtime);
      $mtime = $mtime[1] + $mtime[0];
      return ($mtime);
   }
*/
?>
Commit	Line	Data
59177427	1	<?php
7350889b	2
35586184	3	/**
	4	* date.php
	5	*
6c84ba1e	6	* Copyright (c) 1999-2005 The SquirrelMail Project Team
35586184	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	*
31841a9e	14	* @version $Id$
d6c32258	15	* @package squirrelmail
371e2a0d	16	* @subpackage date
35586184	17	*/
35586184	18
d6c32258	19	/** Load up some useful constants */
b68edc75	20	require_once(SM_PATH . 'functions/constants.php');
35586184	21
8b096f0a	22	/**
	23	* Corrects a time stamp to be the local time.
	24	*
	25	* @param int stamp the timestamp to adjust
	26	* @param string tzc the timezone correction
	27	* @return int the corrected timestamp
	28	*/
d5c4ae7c	29	function getGMTSeconds($stamp, $tzc) {
dc06f88c	30	/* date couldn't be parsed */
913ed9a3	31	if ($stamp == -1) {
	32	return -1;
	33	}
d5c4ae7c	34	/* timezone correction, expressed as `shhmm' */
d5c4ae7c	35	switch($tzc)
dc06f88c	36	{
	37	case 'Pacific':
	38	case 'PST':
d5c4ae7c	39	$tzc = '-0800';
dc06f88c	40	break;
c2e29558	41	case 'Mountain':
	42	case 'MST':
	43	case 'PDT':
	44	$tzc = '-0700';
dc06f88c	45	break;
	46	case 'Central':
	47	case 'CST':
c2e29558	48	case 'MDT':
c2e29558	49	$tzc = '-0600';
dc06f88c	50	break;
	51	case 'Eastern':
	52	case 'EST':
c2e29558	53	case 'CDT':
c2e29558	54	$tzc = '-0500';
dc06f88c	55	break;
dc06f88c	56	case 'EDT':
d5c4ae7c	57	$tzc = '-0400';
dc06f88c	58	break;
c2e29558	59	case 'GMT':
c2e29558	60	$tzc = '+0000';
dc06f88c	61	break;
dc06f88c	62	case 'BST':
d5c4ae7c	63	case 'MET':
	64	case 'CET':
	65	$tzc = '+0100';
	66	break;
dc06f88c	67	case 'EET':
c2e29558	68	case 'IST':
	69	case 'MET DST':
	70	case 'METDST':
	71	$tzc = '+0200';
dc06f88c	72	break;
c2e29558	73	case 'HKT':
c2e29558	74	$tzc = '+0800';
dc06f88c	75	break;
c2e29558	76	case 'JST':
dc06f88c	77	case 'KST':
c2e29558	78	$tzc = '+0900';
dc06f88c	79	break;
0e4ae91a	80	}
d5c4ae7c	81	$neg = false;
d5c4ae7c	82	if (substr($tzc, 0, 1) == '-') {
0e4ae91a	83	$neg = true;
d5c4ae7c	84	} else if (substr($tzc, 0, 1) != '+') {
d5c4ae7c	85	$tzc = '+'.$tzc;
0e4ae91a	86	}
d5c4ae7c	87	$hh = substr($tzc,1,2);
	88	$mm = substr($tzc,3,2);
	89	$iTzc = ($hh * 60 + $mm) * 60;
c2e29558	90	if ($neg) $iTzc = -1 * (int) $iTzc;
d5c4ae7c	91	/* stamp in gmt */
d5c4ae7c	92	$stamp -= $iTzc;
0e4ae91a	93	/ now find what the server is at /
0e4ae91a	94	$current = date('Z', time());
d5c4ae7c	95	/* stamp in local timezone */
d5c4ae7c	96	$stamp += $current;
c2e29558	97
0e4ae91a	98	return $stamp;
0e4ae91a	99	}
0f1835f3	100
0e4ae91a	101	/**
8b096f0a	102	* Returns the (localized) string for a given day number.
	103	* Switch system has been intentionaly chosen for the
	104	* internationalization of month and day names. The reason
	105	* is to make sure that _("") strings will go into the
	106	* main po.
	107	*
	108	* @param int day_number the day number
	109	* @return string the day in human readable form
	110	*/
0e4ae91a	111	function getDayName( $day_number ) {
0f1835f3	112
0e4ae91a	113	switch( $day_number ) {
	114	case 0:
	115	$ret = _("Sunday");
	116	break;
	117	case 1:
	118	$ret = _("Monday");
	119	break;
	120	case 2:
	121	$ret = _("Tuesday");
	122	break;
	123	case 3:
	124	$ret = _("Wednesday");
	125	break;
	126	case 4:
	127	$ret = _("Thursday");
	128	break;
	129	case 5:
	130	$ret = _("Friday");
	131	break;
	132	case 6:
	133	$ret = _("Saturday");
	134	break;
	135	default:
	136	$ret = '';
	137	}
	138	return( $ret );
	139	}
d59837cf	140
8b096f0a	141	/**
	142	* Like getDayName, but returns the short form
	143	* @param int day_number the day number
	144	* @return string the day in short human readable form
	145	*/
22d73941	146	function getDayAbrv( $day_number ) {
	147
	148	switch( $day_number ) {
	149	case 0:
	150	$ret = _("Sun");
	151	break;
	152	case 1:
	153	$ret = _("Mon");
	154	break;
	155	case 2:
	156	$ret = _("Tue");
	157	break;
	158	case 3:
	159	$ret = _("Wed");
	160	break;
	161	case 4:
	162	$ret = _("Thu");
	163	break;
	164	case 5:
	165	$ret = _("Fri");
	166	break;
	167	case 6:
	168	$ret = _("Sat");
	169	break;
	170	default:
	171	$ret = '';
	172	}
	173	return( $ret );
	174	}
	175
8b096f0a	176
	177	/**
	178	* Returns the (localized) string for a given month number.
	179	*
c2e29558	180	* @param string month_number the month number (01..12)
8b096f0a	181	* @return string the month name in human readable form
8b096f0a	182	*/
0e4ae91a	183	function getMonthName( $month_number ) {
	184	switch( $month_number ) {
	185	case '01':
	186	$ret = _("January");
	187	break;
	188	case '02':
	189	$ret = _("February");
	190	break;
	191	case '03':
	192	$ret = _("March");
	193	break;
	194	case '04':
	195	$ret = _("April");
	196	break;
	197	case '05':
	198	$ret = _("May");
	199	break;
	200	case '06':
	201	$ret = _("June");
	202	break;
	203	case '07':
	204	$ret = _("July");
	205	break;
	206	case '08':
	207	$ret = _("August");
	208	break;
	209	case '09':
	210	$ret = _("September");
	211	break;
	212	case '10':
	213	$ret = _("October");
	214	break;
	215	case '11':
	216	$ret = _("November");
	217	break;
	218	case '12':
	219	$ret = _("December");
	220	break;
	221	default:
	222	$ret = '';
	223	}
	224	return( $ret );
	225	}
d59837cf	226
8b096f0a	227	/**
	228	* Returns the (localized) string for a given month number,
	229	* short representation.
	230	*
c2e29558	231	* @param string month_number the month number (01..12)
8b096f0a	232	* @return string the shortened month in human readable form
8b096f0a	233	*/
22d73941	234	function getMonthAbrv( $month_number ) {
	235	switch( $month_number ) {
	236	case '01':
	237	$ret = _("Jan");
	238	break;
	239	case '02':
	240	$ret = _("Feb");
	241	break;
	242	case '03':
	243	$ret = _("Mar");
	244	break;
	245	case '04':
	246	$ret = _("Apr");
	247	break;
	248	case '05':
	249	$ret = _("May");
	250	break;
	251	case '06':
	252	$ret = _("Jun");
	253	break;
	254	case '07':
	255	$ret = _("Jul");
	256	break;
	257	case '08':
	258	$ret = _("Aug");
	259	break;
	260	case '09':
	261	$ret = _("Sep");
	262	break;
	263	case '10':
	264	$ret = _("Oct");
	265	break;
	266	case '11':
	267	$ret = _("Nov");
	268	break;
	269	case '12':
	270	$ret = _("Dec");
	271	break;
	272	default:
	273	$ret = '';
	274	}
	275	return( $ret );
	276	}
	277
8b096f0a	278	/**
	279	* Returns the localized representation of the date/time.
	280	*
	281	* @param string date_format The format for the date, like the input for the PHP date() function.
	282	* @param int stamp the timestamp to convert
	283	* @return string a full date representation
	284	*/
0e4ae91a	285	function date_intl( $date_format, $stamp ) {
e6b76811	286	$ret = str_replace( array('D','F','l','M'), array('$1','$2','$3','$4'), $date_format );
8b096f0a	287	// to reduce the date calls we retrieve m and w in the same call
	288	$ret = date('w#m#'. $ret, $stamp );
	289	// extract day and month in order to replace later by intl day and month
c2e29558	290	$aParts = explode('#',$ret);
e6b76811	291	$ret = str_replace(array('$1','$4','$2','$3',), array(getDayAbrv($aParts[0]),
15d49d77	292	getMonthAbrv($aParts[1]),
91e0dccc	293	getMonthName($aParts[1]),
	294	getDayName($aParts[0])),
	295	$aParts[2]);
8b096f0a	296	return( $ret );
0e4ae91a	297	}
d59837cf	298
8b096f0a	299	/**
	300	* This returns a date of the format "Wed, Oct 29, 2003 9:52 am",
	301	* or the same in 24H format (depending on the user's settings),
	302	* and taking localization into accout.
	303	*
	304	* @param int stamp the timestamp
	305	* @return string the long date string
	306	*/
0e4ae91a	307	function getLongDateString( $stamp ) {
d59837cf	308
0e4ae91a	309	global $hour_format;
c2e29558	310
913ed9a3	311	if ($stamp == -1) {
	312	return '';
	313	}
	314
0e4ae91a	315	if ( $hour_format == SMPREF_TIME_12HR ) {
	316	$date_format = _("D, F j, Y g:i a");
	317	} else {
3f7e6af3	318	$date_format = _("D, F j, Y H:i");
0e4ae91a	319	}
c2e29558	320
0e4ae91a	321	return( date_intl( $date_format, $stamp ) );
0f1835f3	322
0e4ae91a	323	}
d205a7bf	324
8b096f0a	325	/**
	326	* Returns a short representation of the date,
	327	* taking timezones and localization into account.
	328	* Depending on user's settings, this string can be
	329	* of the form: "14:23" or "Jun 14, 2003" depending
	330	* on whether the stamp is "today" or not.
	331	*
	332	* @param int stamp the timestamp
	333	* @return string the date string
	334	*/
0e4ae91a	335	function getDateString( $stamp ) {
d68a3926	336
3e3b60e3	337	global $invert_time, $hour_format, $show_full_date;
dc06f88c	338
	339	if ( $stamp == -1 ) {
	340	return '';
	341	}
c2e29558	342
0e4ae91a	343	$now = time();
c2e29558	344
0e4ae91a	345	$dateZ = date('Z', $now );
3f298968	346
3f298968	347	// FIXME: isn't this obsolete and introduced as a terrible workaround
c2e29558	348	// for bugs at other places which are fixed a long time ago?
0e4ae91a	349	if ($invert_time) {
	350	$dateZ = - $dateZ;
	351	}
b0d8461b	352
	353	// calculate when it was midnight and when it will be,
	354	// in order to display dates differently if they're 'today'
0e4ae91a	355	$midnight = $now - ($now % 86400) - $dateZ;
b0d8461b	356	// this is to correct if after calculations midnight is more than
	357	// one whole day away.
	358	if ($now - $midnight > 86400) {
	359	$midnight += 86400;
	360	}
	361	$nextmid = $midnight + 86400;
c2e29558	362
7e27023f	363	if (($show_full_date == 1) \|\| ($nextmid < $stamp)) {
3e3b60e3	364	$date_format = _("M j, Y");
3e3b60e3	365	} else if ($midnight < $stamp) {
0e4ae91a	366	/* Today */
	367	if ( $hour_format == SMPREF_TIME_12HR ) {
	368	$date_format = _("g:i a");
	369	} else {
3f7e6af3	370	$date_format = _("H:i");
0e4ae91a	371	}
	372	} else if ($midnight - 518400 < $stamp) {
	373	/* This week */
	374	if ( $hour_format == SMPREF_TIME_12HR ) {
	375	$date_format = _("D, g:i a");
	376	} else {
3f7e6af3	377	$date_format = _("D, H:i");
0e4ae91a	378	}
	379	} else {
	380	/* before this week */
	381	$date_format = _("M j, Y");
	382	}
c2e29558	383
0e4ae91a	384	return( date_intl( $date_format, $stamp ) );
0e4ae91a	385	}
0f1835f3	386
8b096f0a	387	/**
	388	* Decodes a RFC 822 Date-header into a timestamp
	389	*
	390	* @param array dateParts the Date-header split by whitespace
	391	* @return int the timestamp calculated from the header
	392	*/
0e4ae91a	393	function getTimeStamp($dateParts) {
	394	/** $dateParts[0] == <day of week> Mon, Tue, Wed
	395	** $dateParts[1] == <day of month> 23
	396	** $dateParts[2] == <month> Jan, Feb, Mar
	397	** $dateParts[3] == <year> 1999
	398	** $dateParts[4] == <time> 18:54:23 (HH:MM:SS)
	399	** $dateParts[5] == <from GMT> +0100
	400	** $dateParts[6] == <zone> (EDT)
	401	**
	402	** NOTE: In RFC 822, it states that <day of week> is optional.
	403	** In that case, dateParts[0] would be the <day of month>
	404	** and everything would be bumped up one.
	405	**/
d5c4ae7c	406
c2e29558	407	/*
0e4ae91a	408	* Simply check to see if the first element in the dateParts
0e4ae91a	409	* array is an integer or not.
dc06f88c	410	* Since the day of week is optional, this check is needed.
0e4ae91a	411	*/
50457d45	412	if (count($dateParts) <2) {
2a9b0fad	413	return -1;
c2e29558	414	} else if (count($dateParts) ==3) {
	415	if (substr_count($dateParts[0],'-') == 2 &&
	416	substr_count($dateParts[1],':') == 2) {
	417	// dd-Month-yyyy 23:19:05 +0200
	418	// redefine the date
	419	$aDate = explode('-',$dateParts[0]);
	420	$newDate = array($aDate[0],$aDate[1],$aDate[2],$dateParts[1],$dateParts[2]);
	421	$dateParts = $newDate;
	422	}
50457d45	423	}
3302d0d4	424
d5c4ae7c	425	/* remove day of week */
	426	if (!is_numeric(trim($dateParts[0]))) {
	427	$dataParts = array_shift($dateParts);
0e4ae91a	428	}
d5c4ae7c	429	/* calculate timestamp separated from the zone and obs-zone */
	430	$stamp = strtotime(implode (' ', array_splice ($dateParts,0,4)));
	431	if (!isset($dateParts[0])) {
	432	$dateParts[0] = '+0000';
0e4ae91a	433	}
dc06f88c	434
d5c4ae7c	435	if (!preg_match('/^[+-]{1}[0-9]{4}$/',$dateParts[0])) {
	436	/* zone in obs-zone format */
	437	if (preg_match('/\((.+)\)/',$dateParts[0],$regs)) {
	438	$obs_zone = $regs[1];
	439	} else {
	440	$obs_zone = $dateParts[0];
	441	}
	442	return getGMTSeconds($stamp, $obs_zone);
	443	} else {
	444	return getGMTSeconds($stamp, $dateParts[0]);
0e4ae91a	445	}
0e4ae91a	446	}
5e90d34a	447
0e4ae91a	448	/* I use this function for profiling. Should never be called in
598294a7	449	actual versions of SquirrelMail released to public. */
d205a7bf	450	/*
5e90d34a	451	function getmicrotime() {
5e90d34a	452	$mtime = microtime();
b9bfd165	453	$mtime = explode(' ',$mtime);
5e90d34a	454	$mtime = $mtime[1] + $mtime[0];
5e90d34a	455	return ($mtime);
9774bdef	456	}
d205a7bf	457	*/
3f7e6af3	458	?>