Question

I messed up with one of my code in functions.php, can someone tell me what this line does?

$output = preg_match_all(''/<img.+src=[''"]([^''"]+)[''"].*>/i'', $post->post_content, $matches);

Obviously, that doesn’t work. That code above was affected by that bug in WordPress that makes single quotes ' become '' when saved (that WordPress editor at the WP backend).

TIA.

Answer 1

The line finds all src=”…” tags for images. The regular expression literally says ” or ‘, followed by anything that is not ‘ or “, followed by another ‘ or “.

To fix it:

$output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);