PHP cross-time zone (UTC time) application solution

PHP cross-time zone (UTC time) application solution_PHP tutorial

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Release： 2016-07-21 15:14:03

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1. Set the program’s internal time zone to UTC time. (UTC can also be called GMT)
PHP settings:
date_default_timezone_set("UTC");
Yii settings:
config Add: 'timeZone'=>'UTC' to /main.php,
After this setting, the time generated by PHP is basically UTC time. For example:
//Output the current UTC time
date ("Y-m-d H:i:s");

2. Store UTC time in the database .
can be controlled with PHP or by setting the database time zone.

3. The time sent by the server to the front-end is in UTC time format , which is converted to local time by JS and then displayed. JS internal data is separated from the display data.
JS conversion Function reference:

Copy code The code is as follows:

 
/**
* Convert UTC time to local time
* @param string utcTime utc time string format:'Y-m-d H:i:s' 
* @return string Local time string format:'Y-m-d H: i:s' 
*/ 
function utcToLocal(utcTime ) { 
if(utcTime==='0000-00-00 00:00:00' || utcTime===null || utcTime==='' || utcTime===undefined) 
return utcTime; 
var locTime = new Date(); //local time object
utcTime=utcTime.replace("-", "/").replace("-", "/"); //Firefox Incompatible with '-' separated date
//Parse string and local time assignment
locTime.setTime(Date.parse(utcTime)-locTime.getTimezoneOffset()*60000); 
//Local time character String formatting 
var year = locTime.getFullYear(); 
var month = preZero(locTime.getMonth()+1); 
var date = preZero(locTime.getDate()); 
 var hour = preZero(locTime.getHours()); 
var minute = preZero(locTime.getMinutes()); 
var second = preZero(locTime.getSeconds()); 
return year+'-' +month+'-'+date+' '+hour+':'+minute+':'+second; 
} 
/**
* Convert local time to UTC time
* @param string locTime utc time string format:'Y-m-d H:i:s' 
* @return string Local time string format:'Y-m-d H: i:s' 
*/ 
function localToUtc(locTime) { 
if (locTime==='0000-00-00 00:00:00' || locTime==='0000-00-00' || locTime===null || locTime==='' || locTime== =undefined) 
return locTime; 
var tmpTime = new Date(); 
var utcTime = new Date(); 
locTime=locTime.replace("-", "/").replace ("-", "/"); //Firefox is not compatible with '-' separated dates
//Parse string
tmpTime.setTime(Date.parse(locTime)); 
if(locTime. length>10) { 
var year = tmpTime.getUTCFulYear(); 
var month = preZero(tmpTime.getUTCMonth()+1); 
var date = preZero(tmpTime.getUTCDate()); 
var hour = preZero(tmpTime.getUTCHours()); 
var minute = preZero(tmpTime.getUTCMinutes()); 
var second = preZero(tmpTime.getUTCSeconds()); 
return year+' -'+month+'-'+date +' '+hour+':'+minute+':'+second; 
} else { 
//Set the date and keep the local time (for UTC conversion) 
utcTime.setFullYear(tmpTime.getFullYear()); 
utcTime.setMonth(tmpTime.getMonth()); utcTime.setMonth(tmpTime.getMonth());//?If it is not repeated, the assignment is invalid
 utcTime.setDate(tmpTime.getDate()); 
var year = utcTime.getUTCFulYear(); 
var month = preZero(utcTime.getUTCMonth()+1); 
var date = preZero(utcTime. getUTCDate()); 
return year+'-'+month+'-'+date; 
} 
} 
//Add leading 0 to a single number 
function preZero(str) { 
return str.toString().length<2 ? '0'+str : str; 
} 