假如一个网站面临国际人群,那么可能分布在不同的时区,那么最好存入UTC时间在数据库,然后读出来以后,根据人群的位置,进行计算时间(月小升认为输出的还是UTC时间,但是要进行后处理,根据读者的时区用JS 来重新输出时间,就可以实现国际化了)
<?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; ?>
1501829643
UTC时间:2017-08-04 06:54:03 – 1501829643
北京时间:2017-08-04 14:54:03 – 1501829643
当前时区:PRC
+8区时间:2017-08-03 22:54:03 – 1501829643
-8区时间:2017-08-04 14:54:03 – 1501829643
1501829643 做成字符串存入数据库,读取的时候
date_default_timezone_set(“Etc/GMT+0”);
2017-08-04 06:54:03
date_default_timezone_set(“Etc/GMT-8”);
2017-08-04 14:54:03
JS转化国际化时间
<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>