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<?php declare(strict_types = 1); function doFoobarNull(string $s): void { if (preg_match('/(foo)?(bar)?(baz)?/', $s, $matches, PREG_OFFSET_CAPTURE)) { var_dump($matches); } } doFoobarNull("baz");
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> array(2) { [0]=> string(3) "baz" [1]=> int(0) } [1]=> array(2) { [0]=> string(0) "" [1]=> int(-1) } [2]=> array(2) { [0]=> string(0) "" [1]=> int(-1) } [3]=> array(2) { [0]=> string(3) "baz" [1]=> int(0) } }

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