ReferenceError:未定义函数 - ReferenceError: function is not defined

我是php和javascript的新手。在我的代码中放入这个changeContent函数后，它找不到它。显示引用错误，我认为这与链接中的"//"有关。我该如何着手修理它？

    <?php
    $one =  "<iframe src='http://www.google.com' width='100%' height='84%'      frameborder='0'></iframe>";
    $two = "<iframe src='http://www.facebook.com' width='100%' height='84%'    frameborder='0'></iframe>";
    $three = "<iframe src='http://www.youtube.com' width='100%' height='84%' frameborder='0'></iframe>";
    echo "
    <html xmlns='http://www.w3.org/1999/xhtml'     xmlns:fb='http://developers.facebook.com/schema/' version='XHTML+RDFa 1.0' xml:lang='en'
    <head>
    <link type='text/css' rel='stylesheet' href='style.css'/>
    <script type='text/javascript'> 
    function changeContent() { 
    document.getElementById('content').innerHTML='<?=$one?>';
    } 
    </script> 
    <script type='text/javascript'>
    function changeContent2() { 
    document.getElementById('content').innerHTML='<iframe src='<?=$two?>' width='100%'                 height='84%' frameborder='0'></iframe>'; 
    } 
    </script> 
    <script type='text/javascript'>
    function changeContent3() { 
    document.getElementById('content').innerHTML='<iframe src='<?$three?>' width='100%'         height='84%' frameborder='0'></iframe></iframe>';
    } 
    </script>
    </head>
    <body>
    <div id='topplace'>
    <ul>
    <li><a href='#' class='classname' onClick='"changeContent()'">google <small         class='button'>Test</small></a></li>
    <li>&nbsp;</li>
    <li><a href='#' class='classname' onClick='"changeContent2()'">facebook <small         class='button'>Test</small></a></li>
    <li>&nbsp;</li>
    <li><a href='#' class='classname' onClick='"changeContent3()'">youtube <small class='button'>test</small></a></li>
    </ul>
    </div>
    </body>";
    ?>

此外，您应该仅将$one/$two/$three值更改为URL。

和

 .innerHTML='<iframe

需要更改为

 .innerHTML='"<iframe

使JS工作

由于使用字符串连接，

所以你不需要在字符串<?=$one?> 中使用这个

相反，这样写$one，或者您可以优先选择{$one}

echo长字符串不是一个好主意，请改用include。

<?php
$one =  "<iframe src='http://www.google.com' width='100%' height='84%'  frameborder='0'></iframe>";
$two = "<iframe src='http://www.facebook.com' width='100%' height='84%'    frameborder='0'></iframe>";
$three = "<iframe src='http://www.youtube.com' width='100%' height='84%' frameborder='0'></iframe>";
include ('view.php');

view.php

<html xmlns='http://www.w3.org/1999/xhtml'
    xmlns:fb='http://developers.facebook.com/schema/'
    version='XHTML+RDFa 1.0' xml:lang='en'>
<head>
<link type='text/css' rel='stylesheet' href='style.css' />
<script type='text/javascript'> 
    function changeContent() { 
    document.getElementById('content').innerHTML='<?=addslashes($one)?>';
    } 
    </script>
<script type='text/javascript'>
    function changeContent2() { 
    document.getElementById('content').innerHTML='<?=addslashes($two)?>'; 
    } 
    </script>
<script type='text/javascript'>
    function changeContent3() { 
    document.getElementById('content').innerHTML='<?=addslashes($three)?>';
    } 
    </script>
</head>
<body>
    <div id="content"></div>
    <div id='topplace'>
        <ul>
            <li><a href='#' class='classname' onClick="changeContent()">google <small
                    class='button'>Test</small>
            </a></li>
            <li>&nbsp;</li>
            <li><a href='#' class='classname' onClick="changeContent2()">facebook
                    <small class='button'>Test</small>
            </a></li>
            <li>&nbsp;</li>
            <li><a href='#' class='classname' onClick="changeContent3()">youtube
                    <small class='button'>test</small>
            </a></li>
        </ul>
    </div>
</body></html>

~~从更改~~

'<iframe src='<?=$two?>' width='100%'

至

//no <?=, and make change ' to '"
'<iframe src='"$two'" width='"100%'"