Question

I’m trying to replace two tags

</th> 
</tr>  

with

</th>
</tr>
</thead>

I think the line break between the tags is preventing the replacement below from working:

$str = preg_replace('/(<\/th>)+(\/tr)/i', '</th></tr></thead>', $str);

Any suggestions please?

Answer 1

This is the regex solution:

$str = preg_replace('/<\/th>\s*<\/tr>/i', '</th></tr></thead>', $str);

Note that the \s* matches any whitespace and you were missing < and > around the /tr.

As pointed out above, an HTML/DOM parser might be better suited to what you want to do.