如何每秒使用jquery/javascript更新PHP当前时间戳 [英] How to update the PHP current timestamp using jquery/javascript every second

问题描述

我正在使用PHP和jQuery/JavaScript处理PHP购物车计时器脚本.

I am working on the PHP cart timer script using PHP and jQuery/JavaScript.

我每秒钟都要迭代一次set-interval函数，以获取PHP的当前时间戳.

I am iterating the set-interval function every seconds to get the PHP's current time-stamp.

将第一个产品添加到购物车后，计时器开始运行，然后停止计时器，提示用户是否要继续还是取消.

When the first product is added to the cart, the timer begins before getting timer-stops it prompts the user, whether the user want to continue or cancel.

我的代码如下

$(document).ready(function(){
    var orderedtime = "echo $_SESSION['ordertime'];";
    if (orderedtime === null || orderedtime == ''){
       console.log("orderedtime is not set");
    }
    else{
       init();
   }
});
var currenttime;
var alerttime;
var extratime;
function cd(){
    alerttime = "<?php echo date('h:i:s', (strtotime($_SESSION['ordertime']) + (1 * 60)));  ?>"
    extratime = "<?php echo date('h:i:s', (strtotime($_SESSION['ordertime']) + (2 * 60)));  ?>";
    redo();
}
function redo(){
    currenttime = "<?php echo date('h:i:s', time()); ?>";
    if(alerttime == currenttime) {
        //doing something   
    }
    else if(currenttime == extratime){
        //doing something
    }
    else{
        cd = setTimeout("redo()",1000);
    }
}
function init(){
    cd();
}

仅存储第一个迭代值的currenttime变量没有得到更新.

The currenttime variable only storing the 1st iteration value is not getting updating.

如何解决此问题?

请帮助我解决问题.

先谢谢了.

推荐答案

您实际上并不是在setTimeout循环中向服务器请求时间.

You're not actually requesting a time from the server in your setTimeout loop.

此行

currenttime = "<?php echo date('h:i:s', time()); ?>";

在第一次生成页面且不再更改时设置.如果要更新时间，则需要向服务器发送请求.不过，这可能不是最好的方法.

is set when the page is first generated and not changed again. If you want the time updated you need to send a request to the server. This probably isn't the best way to do it though.

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