php - preg match count matches

Question

I have a preg match statement, and it checks for matches, but I was wondering how you can count the matches. Any advice appreciated.

$message='[tag] [tag]';
preg_match('/[tag]/i',$message);

for example a count of this message string should lead to 2 matches

Answer 1

$message='[tag] [tag]';
echo preg_match_all('/\[tag\](?>\s|$)/i', $message, $matches);

gives 2. Note you cannot use because the word boundary is before the ], not after.

See preg_match_all.