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<?php $lookup = ['neither', 'upper', 'lower']; $tests = ['A', 'z', '+', '0', 'ǻ', 'Ͱ', null]; foreach ($tests as $test) { $index = preg_match('~(\p{Lu})|(\p{Ll})~u', $test, $out) ? array_key_last($out) : 0; echo "{$test}: {$lookup[$index]}\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
A: upper z: lower +: neither 0: neither ǻ: lower Ͱ: upper Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /in/ldgHN on line 6 : neither

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