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<?php $lookup = ['neither', 'upper', 'lower']; $tests = ['A', 'z', '+', '0', 'ǻ', 'Ͱ', null]; foreach ($tests as $test) { if (preg_match('~(\p{Lu})|(\p{Ll})~u', $test, $out)) { end($out); // advance pointer to final element $index = key($out); } else { $index = 0; } echo "{$test}: {$lookup[$index]}\n"; }
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
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/HEGaT on line 6 : neither
Output for 7.1.25 - 7.1.28, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
A: upper z: lower +: neither 0: neither ǻ: lower Ͱ: upper : neither
preferences:
142.73 ms | 402 KiB | 164 Q