Show Redirecting In .. CountDown Timer PHP

时间:2011-01-01 21:10:10

标签: php javascript timer redirect countdown

到目前为止,我有这个代码,在5秒后将用户重定向到正确的URL:

<?php $url = $_GET['url']; header("refresh:5;url=$url"); include('ads.php'); ?>

请你能告诉我怎样才能显示一个倒计时器,说明重定向... ...是剩下的秒数。我是网络开发的新手,所以所有代码都会有所帮助!

4 个答案:

答案 0 :(得分:17)

<script type="text/javascript">

(function () {
    var timeLeft = 5,
        cinterval;

    var timeDec = function (){
        timeLeft--;
        document.getElementById('countdown').innerHTML = timeLeft;
        if(timeLeft === 0){
            clearInterval(cinterval);
        }
    };

    cinterval = setInterval(timeDec, 1000);
})();

</script>

Redirecting in <span id="countdown">5</span>.

你可以试试这个。

答案 1 :(得分:5)

因为这是一个常见的初学者问题;我只想强调,为了获得最佳实践setInterval,通常可以通过在函数中递归使用setTimeout来避免

例如:

var timer = 5,
    el = document.getElementById('countdown');

(function t_minus() {
    'use strict';
    el.innerHTML = timer--;
    if (timer >= 0) {
        setTimeout(function () {
            t_minus();
        }, 1000);
    } else {
        // do stuff, countdown has finished.
    }
}());

答案 2 :(得分:0)

凯尔的优秀代码。我用暂停和恢复按钮修改了计时器。

<HTML>
<HEAD>
    <SCRIPT LANGUAGE="JavaScript">

    var time_left = 50;
    var cinterval;
    var timestatus=1;

    function time_dec(){
        time_left--;
        document.getElementById('countdown').innerHTML = time_left;
        if(time_left == 0){
            clearInterval(cinterval);
        }
    }

    function resumetime()
    {
        //time_left = 50;
        clearInterval(cinterval);
        cinterval = setInterval('time_dec()', 1000);
    }

    function defaultstart()
    {
        time_left = 50;
        clearInterval(cinterval);
        cinterval = setInterval('time_dec()', 1000);
    }

    function stopstarttime()
    {
        if(timestatus==1)
    {
        clearInterval(cinterval);
        document.getElementById('stopbutton').value="Start";
        timestatus=0;
    }
        else
    {
        clearInterval(cinterval);
        cinterval = setInterval('time_dec()', 1000);
        document.getElementById('stopbutton').value="Stop";
        timestatus=1;
    }
    }

    defaultstart();

    </SCRIPT>
</HEAD>

<body>
    Redirecting In <span id="countdown">50</span>.
    <INPUT TYPE="button" value="stop" id="stopbutton" onclick="stopstarttime()">
</body>
</HTML>

答案 3 :(得分:0)

这是我对它的看法,没有函数之外的变量。取决于jQuery。

function count_down_to_action(seconds, do_action, elem_selector)
{
    seconds = typeof seconds !== 'undefined' ? seconds : 10;
    $(elem_selector).text(seconds)
    var interval_id = setInterval(function(){
        if (seconds <= 0)
        {
            clearInterval(interval_id);
            if (typeof do_action === 'function') 
                do_action();
        }
        else
            $(elem_selector).text(--seconds);
    },1000)
}

以下是使用http://jsfiddle.net/VJT9d/

的示例