How to dynamically load JavaScript or css files in php

<script>tester();</script>

test6.php

    header('Content-Type: application/x-javascript; charset=UTF-8');
    $str = $_GET["str"];
    ?>

    // javascript document
    // by bbs.it-home.org
    alert('');

    function tester(string)
    {
        string ? alert(string) : alert('you call a function named tester');
    }
?>

第二种方法： test.php

  <script>  <li>    function loadjs(url,callback){  <li>        var head = document.getElementsByTagName("head")[0];  <li>        var script = document.createElement('script');  <li>        script.onload = script.onreadystatechange = script.onerror = function (){  <li>            if (script && script.readyState && /^(?!(?:loaded|complete)$)/.test(script.readyState)) return;  <li>            script.onload = script.onreadystatechange = script.onerror = null;  <li>            script.src = '';  <li>            script.parentNode.removeChild(script);  <li>            script = null;  <li>            callback();  <li>        }  <li>        script.charset = "gb2312";  <li>        script.src = url;  <li>        try {  <li>            head.appendChild(script);  <li>        } catch (exp) {}  <li>    }  <li>      <li>    function loadmultijs(url,callback){  <li>        if(Object.prototype.toString.call(url)==='[object Array]'){ //是否数组  <li>            this.suc = 0;           //加载计数  <li>            this.len = url.length;  //数组长度  <li>            var a = this;  <li>            for(var i = 0;i < url.length;i++){  <li>                loadjs(url[i],function(){ a.suc++; if(a.suc == a.len) try{callback();}catch(e){} });  <li>            }  <li>        }  <li>        else if(typeof(url) == 'string') loadjs(url,callback);  <li>    }  <li>      <li>    loadjs("test5.php?return=value",function(){ alert(value); tester(value); });  <li>    </script>

test5.php

var value="this is value.";

加载多JavaScript文件的实例：

  var url = [
            'ajax.php?ajax=1',
            'functions.js'
        ];
    loadmultijs(url,function(){ alert("加载完毕。"); /* 这里可以调用动态加载的JS文件的数据或方法 */ });

2. 动态加载css文件 test.php

            this document has a #e4e4e4 background, a 300px/400px div, and a arial/24px/red words.

复制代码

div.php

    // declare the output of the file as CSS
    header('Content-type: text/css');

    // include the script
    //include('others.php');

    $width  = $_GET['w'];
    $height = $_GET['h'];
?>

div{width:=$width?>px;height:=$height?>px;border:blue 1px solid;}

fonts.php

 // declare the output of the file as CSS
 header('Content-type: text/css');

 // include the script
 //include('others. php');

 $size = $_GET['s'];
 $color = $_GET['c'];
?>
body{font-family:arial;font-size:= $size?>px;color:=$color?>}

That’s it. The method of dynamically loading js and css in php has been introduced. It is recommended that you test it yourself. See if there are any problems with the specific implementation.