Javascript没有在php函数中运行 [英] Javascript isn't running in php function

问题描述

我有2个php文件。文件1包含文件2.文件1从文件2调用php函数。在php函数内部有一堆html。该html完美的作品。在函数结尾我有这个javascript ....

 < script type =text / javascript> 
 alert（'hello'）; 
< / script> 
  

这个javascript没有提示hello。
我做错了什么？

预先感谢您。

编辑： 新的问题，因为我最后一个了。

理论上，下面的代码可以正常运行吗？ （是/否）

 <？php function AlertHelp（）{
？>< script> 
 alert（'help'）; 
< / script><？ 
 AlertHelp（）; 
？> 
  

解决方案

你给了。

我的假设是，你不是通过PHP的 include ， require ， include_once 或 require_once 函数，但事实上使用AJAX加载该页面的内容。

如果是这种情况，那么我还会假设您正在使用 innerHTML 将内容放在页面上。

突然间，解决方案显而易见：< script> code> innerHTML 不会被分析和运行。你可以这样做：

  //假设`result`是包含AJAX响应和elem的变量元素它在
 elem.innerHTML =结果; //这不会改变
 result.match（/< script [^>] *>（[\ s \ S] *？）< \ / script> / i，function （m）{eval（m [1]）;}）; 
  

请注意，应避免 eval 如果可能的话。考虑重新设计你的布局来代替使用回调。

Where am I going wrong with my programming logic here?

I have 2 php files. File 1 includes File 2. File 1 calls a php function from File 2. Inside the php function there is a bunch of html. The html works perfectly. At the end of the function I have this javascript....

<script type="text/javascript">
alert('hello');
</script>

This javascript isn't alerting "hello". What am I doing wrong?

Thank you in advance.

EDIT: New question because I skrewed the last one up.

In theory would the code below run properly? (yes/no)

<?php function AlertHelp(){ 
    ?><script>
        alert('help');
    </script><?
AlertHelp();
?>

解决方案

Long shot on a wild guess here with the limited information you gave.

My assumption is that you are not "including" the file via PHP's include, require, include_once or require_once functions, but are in fact using AJAX to load in the page's content.

If this is the case, then I shall also assume you're using innerHTML to put the content on the page.

Suddenly the solution is obvious: <script> tags added by innerHTML are not parsed and run. You could probably do something like this:

// assume `result` is the variable containing the AJAX response and `elem` the element it goes in
elem.innerHTML = result; // this doesn't change
result.match(/<script[^>]*>([\s\S]*?)<\/script>/i,function(m) {eval(m[1]);});

Please note however that eval should be avoided if possible. Consider redesigning your layout to use callbacks instead.

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