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<?php function countLetters($matches) { return $matches[0] . '(' . strlen($matches[0]) . ')'; } $input = "Welcome to W3Schools.com!"; $pattern = '/[a-z0-9\.]+/i'; $limit = -1; $count = null; $flag = 0; $result = preg_replace_callback($pattern, 'countLetters', $input, $limit, $count, $flag); echo $result;
Output for git.master_jit, git.master, rfc.property-hooks
Welcome(7) to(2) W3Schools.com(13)!

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