Share a php js real-time display time problem
本文给大家分享的是解决的php+js实时显示时间问题，主要是自己当时的理解有问题，也许大家有和我一样的情况，这里分享给大家
我们先来看下这段代码
$(function(){
setInterval(function(){
var timer = '';
$("#test").append(timer);
},500);
});这段代码哪里有问题，为啥网页加载后网页一直是那个时间不会变呢？php和js的加载机制有啥不同？
这样是不对的，php代码在输出前被解释，浏览器收到的代码应该是这个样子的
$(function(){
setInterval(function(){
var timer = '2015-01-02 12：02：02';
$("#test").append(timer);
},500);
});这样，当你定时更新的都是一个定值
修改如下
// 对Date的扩展，将 Date 转化为指定格式的String
// 月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符，
// 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字)
// 例子：
// (new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423
// (new Date()).Format("yyyy-M-d h:m:s.S") ==> 2006-7-2 8:9:4.18
Date.prototype.Format = function (fmt) { //author: meizz
var o = {
"M+": this.getMonth() + 1, //月份
"d+": this.getDate(), //日
"h+": this.getHours(), //小时
"m+": this.getMinutes(), //分
"s+": this.getSeconds(), //秒
"q+": Math.floor((this.getMonth() + 3) / 3), //季度
"S": this.getMilliseconds() //毫秒
};
if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
for (var k in o)
if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
return fmt;
}
$(function(){
setInterval(function(){
var timer = new Date().Format("yyyy-MM-dd HH:mm:ss");
$("#test").append(timer);
},500);
});以上就是本文的全部内容，更多相关教程请访问JavaScript视频教程！
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