Search string for tag text

Question

How can I search a string for a tag inside [ ] with parameters? So, for example, my string may have in it somewhere:

[tag id='1,2,5']

The numbers in the id parameter could be anything. I want to search to see if the tag is present and if so extract the numbers in the id paramter.

Answer 1

preg_match_all("~\[tag\s+id='([^']+)'\]~", $str, $matches);
var_dump($matches);

http://ideone.com/6b9JX