Exemple d'utilisation de la fonction Date de javascript

Bonjour, je viens de m’apercevoir qu'en JavaScript les mois, les heures, les minutes et les secondes sont sur qu'un seul chiffre (jusqu'à 9). Et pire, les mois commencent à 0 et finissent à 11.

Pour infos, j'essayais de récupérer/créer le "timestamp" comme en PHP.

J'ai une page sur laquelle est affichée une date à chaque article, et je souhaitais récupérer/créer le timestamp - j'avais 1 mois d'écars ou 50 milles ans de décallage.

Je vous met donc, rapidement ce que j'ai fais :

Script avec 127 lignes

001<script type="text/javascript">
002/******
003 * JavaScript
004 *
005 * Convertit une date type datetime (donc qui vient de SQL)
006 * → datetime to timestamp unix
007 *
008 **/
009function mk_time(date_format_mysql) {
010
011	var year = date_format_mysql.substr(0,4);
012	var month = date_format_mysql.substr(5,2);
013	var month = month - 1; // because in js 12 (december) do not exist (0-11) https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date
014	/* Who has already seen in a calendar 0 for the month of January and 11 for December. Again for the days of the week (weekday) 0-6 ok but for the number of a month its strong... */
015	var day = date_format_mysql.substr(8,2);
016	var hour = date_format_mysql.substr(11,2);
017	var min = date_format_mysql.substr(14,2);
018	var sec = date_format_mysql.substr(17,2);
019
020/*
021	// Je laisse cette facon.. :/
022	// si pour quelques raisons le formatage "date_format_mysql" ne serait pas.
023	// exemple : 2023-1-23 3:6:41
024	
025	var dateMysqlArray = date_format_mysql.split(" ");
026	var dateFull = dateMysqlArray[0];
027	var hourFull = dateMysqlArray[1];
028
029	var dateArray = dateFull.split("-");
030	var year = dateArray[0];
031	var month = dateArray[1];
032	var day = dateArray[2];
033
034	var hourArray = hourFull.split(":");
035	var hour = hourArray[0];
036	var min = hourArray[1];
037	var sec = hourArray[2];
038*/	
039//	return year+'-'+month+'-'+day+' '+hour+':'+min+':'+sec;
040
041	a = new Date();
042
043	a.setYear(year);
044	a.setMonth(month);
045	a.setDate(day);
046	a.setHours(hour);
047	a.setMinutes(min);
048	a.setSeconds(sec);
049
050	return a.getTime()/1000;
051	//return Math.floor(a.getTime()/1000);
052
053}
054
055/******
056 * JavaScript
057 *
058 * Pour l'affichage en date type datetime
059 * → date JS to datetime
060 *
061 **/
062function date_transform_number(number, type) {
063	if(type == 'month') {
064		/*const months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];*/
065		const months = ["01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"];
066		nbr = months[number];
067	}
068	if(type == 'day' || type == 'hour' || type == 'min' || type == 'sec') {
069		nbr = number < 10 ? '0'+number : number;
070	}
071	return nbr;
072}
073
074//--------------------------------------------
075// just for info current date
076//--------------------------------------------
077var dateClass = new Date();
078
079var time = dateClass.getTime();
080var now = Date.now();
081
082var year = dateClass.getFullYear();
083var month = dateClass.getMonth();
084//var month = date_transform_number(month, 'month');
085var weekday = dateClass.getDay(); // (0-6)
086var day = dateClass.getDate();
087//var day = date_transform_number(day, 'day');
088var hour = dateClass.getHours();
089//var hour = date_transform_number(hour, 'hour');
090var min = dateClass.getMinutes();
091//var min = date_transform_number(min, 'min');
092var sec = dateClass.getSeconds();
093//var sec = date_transform_number(sec, 'sec');
094
095console.log('time: '+time+' → '+typeof time);
096console.log('now: '+now+' → '+typeof now);
097console.log('date: '+year+'-'+month+'-'+day+' '+hour+':'+min+':'+sec);
098
099//--------------------------------------------
100
101
102//--------------------------------------------
103// Well...
104//--------------------------------------------
105console.log('n');
106
107var text_content = '2022-12-14 01:00:00';
108console.log('text_content: '+text_content+' → '+typeof text_content);
109
110// Ma fonction.... il y avait un mois de décalage ;)
111var timestamp_content = mk_time(text_content);
112console.log('timestamp_content: '+timestamp_content+' → '+typeof text_content);
113
114var date_content = new Date(timestamp_content * 1000);
115console.log('date_content: '+date_content+' → '+typeof date_content);
116
117//var timestamp_content_2 = Math.floor(date_content);
118//console.log('timestamp_content_2: '+timestamp_content_2+' → '+typeof timestamp_content_2);
119
120//var timestamp_content_3 = timestamp_content.substr(-4);
121//console.log('timestamp_content_4: '+timestamp_content_3+' → '+typeof timestamp_content_3); // ???
122
123//var timestamp_content_4 = timestamp_content.split(".");
124//console.log('timestamp_content_3: '+timestamp_content_4[0]+' → '+typeof timestamp_content_4[0]); // ???
125
126//--------------------------------------------
127</script>

Cà nous affiche la bonne date dans la console firefox/chrome (F12) sur la ligne "date_content" :

Script avec 8 lignes

001time: 1674442484360 → number
002now: 1674442484360 → number
003date: 2023-0-23 3:54:44
004
005text content: 2022-12-14 01:00:00 → string
006timestamp_content: 1670976000.363 → string
007date_content: Wed Dec 14 2022 01:00:00 GMT+0100 (heure normale d’Europe centrale) → object
008timestamp_content_2: 1670976000363 → number

En PHP :

Script avec 35 lignes

001<?php
002/******
003 * PHP
004 *
005 * Convertit une date type datetime
006 * → datetime to timestamp unix
007 *
008 **/
009function mk_time($date_format_mysql) {
010
011    $year = substr($dateTime2mysql,0,4);
012    $month = substr($dateTime2mysql,5,2);
013    $day = substr($dateTime2mysql,8,2);
014    $hour = substr($dateTime2mysql,11,2);
015    $min = substr($dateTime2mysql,14,2);
016    $sec = substr($dateTime2mysql,17,2);
017
018    return mktime($hour, $min, $sec, $month, $day, $year);
019}
020
021$date_text = '2022-12-14 01:00:00';
022
023$time_php_test = mk_time($date_text);
024$date_php = date('Y-m-d H:i:s', $time_php_test);
025
026// old value sans enlever "-1" du mois d'une date PHP
027$time_js_test = '1673654400';
028$date_js = date('Y-m-d H:i:s', $time_js_test);
029
030echo 'Date PHP OK : '.$time_php_test.' → '.$date_php.'<br />';
031echo 'Date PHP NOK : '.$time_js_test.' → '.$date_js.'<br />';
032    
033// Date PHP OK : 1670976000 → 2022-12-14 01:00:00
034// Date PHP NOK : 1673654400 → 2023-01-14 01:00:00
035

Voilà :)

Salutations,
Romain