如何从jQuery ajax成功函数返回数组并在循环中使用它?

问题描述

我想使每个帖子的时间实时更改.

I want to make the time of each post to change in realTime.

这只是带有时间的字体，因为要在这里很重要.

This is only the font with the time,beacuse this is want is the important here.

<font class="timestamp" postdate="unixTimeStamp" postID="6">2 min ago</font>

<font class="timestamp" postdate="unixTimeStamp" postID="5">4 min ago</font>

<font class="timestamp" postdate="unixTimeStamp" postID="4">9 min ago</font>

这是JavaScript

An this is the javascript

setInterval(updateTimestamps,30000);

var realTime=<?php echo time();?>;

function updateTimestamps(){

  $(".timestamp").each(function(i){

     var timestamp=$(this).attr("postdate"),
     postID=$(this).attr("postID"),
     math=realTime-timestamp;

  if(math<3600){var dataString='postID='+postID+'&timestamp='+timestamp;

           $.ajax({
                     type:"POST",
                     url:"http://site.com/ajax/humanTime.php",
                     data:dataString,
                     cache:false,
                     success:function(html){
                                $("[postID='"+postID+"']").html(html);
                     }

            });

  }

});

}

在humanTime.php中，我计算时间:

In humanTime.php I calculate the time:

$timestamp = $_POST['timestamp'];

$now=time(); $diff= $now - $timestamp;  and so on..

但是问题在于它建立了许多连接，因为每个帖子都调用了脚本.并且以为我可以建立1个连接，将数据排序到一个数组中，然后更改时间.但是我从未使用过json，而且我确定我想要的东西是否真的有可能

But the problem is that it makes to many connections,beacuse the script is called for every post. And thought that maybe i can make 1 connection sort the data into a array and then to change the time. But i never worked with json and i'm sure if what i want is really possible

推荐答案

我会做这样的事情:

setInterval(updateTimestamps,30000);
var ids = new Array();

function updateTimestamps(){
    $(".timestamp").each(function(i){
    var obj = new Object();
    obj.id = $(this).attr("postID");
    obj.timestamp = $(this).attr("postdate");
        ids.push(obj);
    }

    $.post("http://site.com/ajax/humanTime.php", {"time": ids}, function(data) {
        for (i = 0; i < data.length; i++) {
            $("#" + data[i].id).html(data[i].content);
        }
    }, "json");
}

在humanTime.php中:

And in humanTime.php:

<?php
    $ids = json_decode($_POST['time']);
    foreach($ids as $id) {
        // Calculate human time ...
    }
?>

然后返回如下内容:

[{id:1, content:1 minute ago}, {id:3, content: 5 hours ago}]

PS:这是您所要求的解决方案，但我认为Bram的方法更好.

PS: This solution is what you requested, but I think Bram aproach is better.

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