php时间国际化和本地转换

<?php
echo '<meta charset="UTF-8">';
 
date_default_timezone_set("UTC"); 
$time1 = date("Y-m-d H:i:s");
$times1 = strtotime($time1);
 
echo time()."<br />";
 
echo "UTC时间：".$time1." - ".$times1."<br>";  
 
date_default_timezone_set("PRC");  
$time1 = date("Y-m-d H:i:s");
$times1 = strtotime($time1);
echo "北京时间：".$time1." - ".$times1."<br>";   
echo "当前时区：".date_default_timezone_get()."<br>";  
 
date_default_timezone_set("Etc/GMT+8");
$time1 = date("Y-m-d H:i:s");
$times1 = strtotime($time1);
echo "+8区时间：".$time1." - ".$times1."<br>";   
 
date_default_timezone_set("Etc/GMT-8");
$time1 = date("Y-m-d H:i:s");
$times1 = strtotime($time1);
echo "-8区时间：".$time1." - ".$times1."<br>";   
 
date_default_timezone_set("Etc/GMT+0");
$time = '1501829643';
$stime = strftime( "%Y-%m-%d %H:%M:%S" ,$time)."<br>";
echo $stime;
 
date_default_timezone_set("Etc/GMT-8");
$time = '1501829643';
$stime = strftime( "%Y-%m-%d %H:%M:%S" ,$time)."<br>";
echo $stime;
?>

<script>
 
alert(utcToLocal("2017-08-04 07:03:30"));
 
alert(localToUtc("2017-08-04 15:04:06"));
/** 
* 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<2 ? '0'+str : str; 
} 
 
 
</script>