Question

I have a text in my databse. For example:

Dummy Text Here...
<span class="youtube">nmkW544sK9U</span>

Dummy Text Here...
<span class="youtube">yUBKZvq5G2g</span>

…and I need it to be replaced with:

Dummy Text Here...
<iframe width="640" height="395" frameborder="0" allowfullscreen="" src="http://www.youtube.com/embed/nmkW544sK9U?rel=0"></iframe>

Dummy Text Here...
<iframe width="640" height="395" frameborder="0" allowfullscreen="" src="http://www.youtube.com/embed/yUBKZvq5G2g?rel=0"></iframe> 

But I don’t know regular expressions well enough and ask you to help me.

Answer 1

Something along these lines should work.

$replacement = '<iframe width="640" height="395" frameborder="0" allowfullscreen="" src="http://www.youtube.com/embed/$1?rel=0"></iframe>';
preg_replace('/<span class="youtube">(\w+)<\/span>/', $replacement, $string);