replace <br> to new line between pre tag

Question

I want to convert

<p>Code is following</p>
<pre>
&lt;html&gt;<br>&lt;/html&gt;
</pre>

to

<p>Code is following</p>
<pre>
&lt;html&gt;
&lt;/html&gt;
</pre>

I don't know how to write regular expression for replace between pre tag in PHP.

I tried this code http://stackoverflow.com/questions/1517102/replace-newlines-with-br-tags-but-only-inside-pre-tags

but it's not working for me.

Answer 1

You shouldn't use regex to match html tags because it is theoretically impossible.

There are some php librarys for html parsing out there, a quick search on google showed this. http://simplehtmldom.sourceforge.net/

Try to get the code between the "pre" tags and use a simple regex on this.

Answer 2

Which answer are you using code from?

Assuming it was the accepted answer, just reverse the preg_replace() line as follows;

$parts[$idx] = preg_replace('#<br\s*/?>#', "\n", $part);

Answer 3

Try this:

$newtext = preg_replace('@<pre>.*<br[/>]*?>?</pre>@si','\n',$text);

Answer 4

Oh my God. Here we go again.

Have you tried using an XML parser instead?

Answer 5

if (preg_match("/<pre>.*(<br(|\s*\/)>).*<\/pre>/m", $str)) {
    $str = preg_replace("/(<br(|\s*\/)>)/", "\n", $str);
}

Works just the same. Replaces <br>, <br/>, <br /> only when found inside <pre>...</pre>