[The Geek]

Not 100% sure of what you're trying to do but this would grab the values from the above string:

\[img width=(\d*) height=(\d*)\]

so this:

PHP Code:

$subject = '[img width=320 height=217]';
$find = '/\[img width=(\d*) height=(\d*)\]/im';
$replace = 'width=\1 and height=\2';
$result = preg_replace($find, $replace , $subject); 


would give you:

width=320 and height=217