PHP跨时区(UTC时间)应用解决方案_PHP

1.将程序内部时区设置为UTC时间.(UTC 也可以叫 GMT)
PHP设置:
date_default_timezone_set("UTC");
Yii设置:
config/main.php 中添加 :'timeZone'=>'UTC',
如此设置后,PHP生成的时间基本都是UTC时间了.例如:
//输出当前UTC时间
date("Y-m-d H:i:s");

2.数据库中存储UTC时间.
可以用PHP控制,也可以通过设置数据库时区来实现.

3.服务端发送到前端的时间均为UTC时间格式, 由JS将其转换为本地时间后进行显示.JS内部数据与显示数据分离.
JS转换函数参考:
复制代码 代码如下:
/**
* 将UTC时间转为本地时间
* @param string utcTime utc时间字符串 格式 :'Y-m-d H:i:s'
* @return string 本地时间字符串 格式 :'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时间对象
utcTime=utcTime.replace("-", "/").replace("-", "/"); //火狐不兼容'-'分隔日期
//解析字符串及本地时间赋值
locTime.setTime(Date.parse(utcTime)-locTime.getTimezoneOffset()*60000);
//本地时间字符串格式化
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;
}
/**
* 将本地时间转为UTC时间
* @param string locTime utc时间字符串 格式 :'Y-m-d H:i:s'
* @return string 本地时间字符串 格式 :'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("-", "/"); //火狐不兼容'-'分隔日期
//解析字符串
tmpTime.setTime(Date.parse(locTime));
if(locTime.length>10) {
var year = tmpTime.getUTCFullYear();
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 {
//设置日期,保留本地时间(供UTC转换用)
utcTime.setFullYear(tmpTime.getFullYear());
utcTime.setMonth(tmpTime.getMonth());utcTime.setMonth(tmpTime.getMonth());//?若不重复,则赋值无效
utcTime.setDate(tmpTime.getDate());
var year = utcTime.getUTCFullYear();
var month = preZero(utcTime.getUTCMonth()+1);
var date = preZero(utcTime.getUTCDate());
return year+'-'+month+'-'+date;
}
}
//单个数字添加前导0
function preZero(str) {
return str.toString().length}