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<?php $pattern = '/^[^\d\r\n]*\b(\d+)([admno]\d+)?/'; $strings = [ "Some string 12345a1% some other string.", "Somet string 23456b2! some other string" ]; foreach ($strings as $s) { preg_match($pattern, $s, $match); var_dump($match); }
Output for git.master_jit, git.master, rfc.property-hooks
array(3) { [0]=> string(19) "Some string 12345a1" [1]=> string(5) "12345" [2]=> string(2) "a1" } array(2) { [0]=> string(18) "Somet string 23456" [1]=> string(5) "23456" }

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