PHP - 正则表达式改变'周围'标签

Question

I have a piece of UTF-8 encoded HTML that I need to get one file reference out of, then I need to change it entirely using said file reference.

This is the starting code:

<object width="250" height="20" data="player.swf" type="application/x-shockwave-flash">
<param name="data" value="player.swf" />
<param name="flashvars" value="file=TEST.MP3" />
<param name="src" value="player.swf" />
</object>

As you can see, it's an object tag that contains a reference to a file, and a flash player.

This is the code that I require:

<p><a href="TEST.MP3">TEST.MP3</a></p>

I've tried getting the file reference out first, then just replacing the object part entirely with an a tag, but this just replaces all object tags and not just the one I need.

The easiest way would be ofcourse to just 'replace' the object tag with an a tag, but I don't know how to do a Regex to find and replace everything 'around' the file you need.

What would be the best way to do this?

Answer 1

If you know that the surrounding code will be the same in all future cases and only the TEST.MP3 changes you could use the following RegEx that I've tested:

<?php
header('Content-type: text/plain');
$test = '<object width="250" height="20" data="player.swf" type="application/x-shockwave-flash">
<param name="data" value="player.swf" />
<param name="flashvars" value="file=TEST.MP3" />
<param name="src" value="player.swf" />
</object>';

echo preg_replace('/^\<object.*
.*
.*file\=(.*)\".*
.*
.*/mi','<a href="$1">$1</a>',$test);

?>

This is working in PHP 5.3.10.