php regex find text within parenthesis -

using php or powershell need in finding text in text file.txt, within parenthesis output value.

example:

file.txt looks this:

this test (mytest: test) in parenthesis     testing (mytest: johnsmith) again. not testing testing (mytest: 123)  

my code:

$content = file_get_contents('file.txt');     $needle="mytest" preg_match('~^(.*'.$needle.'.*)$~', $content, $line); 

output new text file be:

123test, johnsmith,123, 

use pattern:

~\(%s:\s*(.*?)\)~s 

note %s here not part of actual pattern. it's used sprintf() substitute values passed arguments. %s stands string, %d signed integer etc.

explanation:

• ~ - starting delimiter
• \( - match literal (
• %s - placeholder $needle value
• : - match literal :
• \s* - 0 or more whitespace characters
• (.*?) - match (and capture) inside parentheses
• \) - match literal )
• ~ - ending delimiter
• s - pattern modifier makes . match newlines well

code:

$needle  =  'mytest'; $pattern = sprintf('~\(%s:\s*(.*?)\)~s', preg_quote($needle, '~')); preg_match_all($pattern, $content, $matches); var_dump($matches[1]); 

output:

array(3) {   [0]=>   string(4) "test"   [1]=>   string(9) "johnsmith"   [2]=>   string(3) "123" } 

demo