preg_match - get numeric value from a function

I am trying to get the value from transaction function.

Example:

$response = "transaction(12346675); $('#Tracking').html('<script> random random  random</script>');";

I want to get 12346675 value. How can that be done?

I have tried preg_match('/([\w\_\d]+)\(([\w\W]*)\)/', $response, $match); but it dont seem to work开发者_Go百科.

Thanks

preg_match('/^transaction\((\d+)\)/', $str, $m);
print_r($m);

Generalized patterns:

• ^\s*\w+\s*\(\s*(\d+)\s*\)
• If function name is a PHP identifier:
  ^\s*[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*\s*\(\s*(\d+)\s*\)

For similar question, see: Regex Help, Search for function names and return them

reg_match('/\D+\((\d+)\)\.*/', $response, $match);

Fetching the number after the first word, provided it is enclosed in parentheses:

preg_match('/\w+\((\d+)\)/', $response, $match);

If you're looking for the first number of the line, then there's no need to complicate it with the second half of your expression:

preg_match('/(\d+)/', $response, $match);

This is a simple match for the first number found on your line.