File Source for date.php

<?php
/**
* Fichier utilitaire de gestion des dates
*
* PHP versions 4 et 5
*
* LODEL - Logiciel d'Edition ELectronique.
*
* Copyright (c) 2001-2002, Ghislain Picard, Marin Dacos
* Copyright (c) 2003, Ghislain Picard, Marin Dacos, Luc Santeramo, Nicolas Nutten, Anne Gentil-Beccot
* Copyright (c) 2004, Ghislain Picard, Marin Dacos, Luc Santeramo, Anne Gentil-Beccot, Bruno Cénou
* Copyright (c) 2005, Ghislain Picard, Marin Dacos, Luc Santeramo, Gautier Poupeau, Jean Lamy, Bruno Cénou
* Copyright (c) 2006, Marin Dacos, Luc Santeramo, Bruno Cénou, Jean Lamy, Mikaël Cixous, Sophie Malafosse
* Copyright (c) 2007, Marin Dacos, Bruno Cénou, Sophie Malafosse, Pierre-Alain Mignot
*
* Home page: http://www.lodel.org
*
* E-Mail: lodel@lodel.org
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* @author Ghislain Picard
* @author Jean Lamy
* @copyright 2005, Ghislain Picard, Marin Dacos, Luc Santeramo, Gautier Poupeau, Jean Lamy, Bruno Cénou
* @copyright 2006, Marin Dacos, Luc Santeramo, Bruno Cénou, Jean Lamy, Mikaël Cixous, Sophie Malafosse
* @copyright 2007, Marin Dacos, Bruno Cénou, Sophie Malafosse, Pierre-Alain Mignot
* @licence http://www.gnu.org/copyleft/gpl.html
* @version CVS:$Id:
* @package lodel
*/
/**
* Converti une date humaine en date mysql
*
* Cette fonction accepte diverses formats de date :
* - jj/mm/aaaa
* - jj mm aaaa
* - jj.mm.aaaa
* - jj-mm-aaaa
*
* @param string $s la date 'humaine'
* @return string la date transformée en format mySQL
*/
function mysqldate($s, $type)
{
//what is the delimiting character? (support space, slash, dash, point)
$s = trim($s);
if($type == 'time') {
if (strpos($s, ':') > 0) {
$delimiter = ':';
} elseif (strpos($s, 'h') > 0) {
$delimiter = 'h';
} elseif (strpos($s, 'H') > 0) {
$delimiter = 'H';
}
} else {
if (strpos($s, '/') > 0) {
$delimiter = "\/";
} elseif (strpos($s, '-') > 0) {
$delimiter = '-';
} elseif (strpos($s, '.') > 0) {
$delimiter = '.';
} elseif (strpos($s, ' ') > 0) {
$delimiter = ' ';
}
}
if (!$delimiter) {
if (strlen($s) == 4 && is_numeric($s)) { // une année seulement
return $s . '-00-00';
} elseif(strlen($s) > 0) {
return "bad date";
} else {
return '';
}
}
if(preg_match("`^\d\d\d\d.\d\d.\d\d$`", $s))
list ($y, $m, $d) = preg_split("/s*$delimiter+/", $s);
else
list ($d, $m, $y) = preg_split("/s*$delimiter+/", $s);
$d = intval(trim($d));
if ((($d < 1 || $d > 31) && !preg_match("`[:hH-]`", $delimiter))) {
return 'bad date';
}
$m = trim($m);
if($type != 'time') {
if (intval($m) == 0) {
$m = mois($m);
}
if ($m == 0) {
return '';
}
if (!isset ($y)) { // la date n'a pas ete mise
$today = getdate(time());
$y = $today['year']; // cette annee
if ($m < $today['mon']) {
$y ++; // ou l'annee prochaine
}
}
$y = intval(trim($y));
//the last value is always the year, so check it for 2- to 4-digit convertion
if (intval($y) < 100) {
$y += 2000;
}
if (!checkdate($m, $d, $y)) {
return '';
}
if ($d < 10 && strlen($d) == 1) {
$d = "0$d";
}
if ($m < 10 && strlen($m) == 1) {
$m = "0$m";
}
return "$y-$m-$d";
}
else {
if(!isset($y))
$y = '00';
return $d.":".$m.":".$y;
}
}
/**
* Retourne le chiffre du mois par rapport à son nom
*
* @param string le nom du mois
* @return integer le numéro du mois
*/
function mois($m)
{
$m = strtolower(utf8_decode($m));
switch (substr($m, 0, 3)) {
case "jan" :
return 1;
case "fev" :
return 2;
case "fv" :
return 2;
case "fév" :
return 2;
case "mar" :
return 3;
case "avr" :
return 4;
case "mai" :
return 5;
case "aou" :
return 8;
case "ao" :
return 8;
case "aoû" :
return 8;
case "sep" :
return 9;
case "oct" :
return 10;
case "nov" :
return 11;
case "dec" :
return 12;
case "déc" :
return 12;
case "dc" :
return 12;
}
switch (substr($m, 0, 4)) {
case "juin" :
return 6;
case "juil" :
return 7;
}
return 0;
}
/**
* Transforme une date avec heure dans le format 'datetime' de MySQL
*
* @param string $s la date
* @param string $type le type de format dans lequel transformer la date donnée. Par défaut
* 'datetime'
* @return string la date transformée
*/
function mysqldatetime($s, $type = 'datetime')
{
$s = trim(stripslashes($s));
if (!$s) {
return '';
}
if ($s == 'aujourd\'hui' || $s == 'today' || $s == 'maintenant' || $s == 'now') {
$timestamp = time();
} elseif ($s == 'hier' || $s == 'yesterday') {
$arr = localtime(time(), 1);
$timestamp = mktime($arr['tm_hour'], $arr['tm_min'], $arr['tm_sec'], $arr['tm_mon'] + 1, $arr['tm_mday'] - 1, 1900 + $arr['tm_year']);
} elseif ($s == 'demain' || $s == 'tomorrow') {
$arr = localtime(time(), 1);
$timestamp = mktime($arr['tm_hour'], $arr['tm_min'], $arr['tm_sec'], $arr['tm_mon'] + 1, $arr['tm_mday'] + 1, 1900 + $arr['tm_year']);
} elseif (preg_match("/^\s*(dans|il y a)\s+(\d+)\s*(an|mois|jour|heure|minute)s?\s*$/i", $s, $result)) {
$val = $result[1] == 'dans' ? $result[2] : - $result[2];
$arr = localtime(time(), 1);
switch ($result[3]) {
case 'an' :
$arr['tm_year'] += $val;
break;
case 'mois' :
$arr['tm_mon'] += $val;
break;
case 'jour' :
$arr['tm_mday'] += $val;
break;
case 'heure' :
$arr['tm_hour'] += $val;
break;
case 'minute' :
$arr['tm_min'] += $val;
break;
}
$timestamp = mktime($arr['tm_hour'], $arr['tm_min'], $arr['tm_sec'], $arr['tm_mon'] + 1, $arr['tm_mday'], 1900 + $arr['tm_year']);
} else {
$date = mysqldate($s, $type);
if($date == "bad date")
return $type;
elseif($type == 'time' && $date)
return $date;
elseif(!$date && $type != 'time')
$date = date("Y-m-d");
elseif(!$date)
$date = date("H:i:s");
list ($y, $m, $d) = explode('-', $date);
if ($type == "date") {
return $date;
}
if (preg_match("/(\d+)[:hH](?:(\d+)(?:[:](\d+))?)?\s*$/", $s, $result)) { // time
$timestamp = mktime($result[1], $result[2], $result[3], $m, $d, $y);
if ($timestamp <= 0) { // no algebra
$time = sprintf("%02d:%02d:%02d", $result[1], $result[2], $result[3]);
}
} else {
$arr = localtime();
$timestamp = mktime($arr['tm_hour'], $arr['tm_min'], $arr['tm_sec'], $m, $d, $y);
if ($timestamp <= 0) { // no algebra
$time = sprintf("%02d:%02d:%02d", $arr['tm_hour'], $arr['tm_min'], $arr['tm_sec']);
}
}
}
if ($timestamp <= 0 && $time) {
if ($type == 'datetime' && $date) {
return trim($date.' '.$time);
}
return '';
}
if ($type == 'date') {
return date('Y-m-d', $timestamp);
} elseif ($type == 'datetime') {
return date('Y-m-d H:i:s', $timestamp);
} elseif ($type == 'time') {
return date('H:i:s', $timestamp);
} elseif ($type == 'timestamp') {
return $timestamp;
} else {
die('type inconnu dans mysqldatetime');
}
}
?>

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Source for file date.php