<?php

sleep(10);

if (isset($_REQUEST[‘sleep‘])) {
        echo json_encode(array(‘code‘ => 1, ‘message‘ => ‘request‘));
        die;
}else{
        echo json_encode(array(‘code‘ => 0, ‘message‘ => ‘request_no‘));
        die;
}

CODE hank1.php


<script src="http://www.mamicode.com/static/jquery-3.1.0.min.js"></script>
<script>

    var z = currentTime();

    var flag = 1;
    var long_time = 2000;
    setInterval(function () {
        var c = currentTime() - z;
        if (c > 10 && flag) {
            flag = 0;
        }
    }, 500);

    $.post(‘hank2.php‘, {sleep: ‘hank_v‘}, function (data) {
        var c = currentTime();
        var interval = c - z
        if (interval < long_time) {
            console.log(‘ok‘);
            ajax_back(data)
        } else {
            error(‘error‘);
        }
    });


    function ajax_back(data) {
        console.log(data);
    }
    function error(data) {
        console.log(data)
    }

    function currentTime() {
        var d = new Date();
        return d.getTime();
    }

</script>