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<?php $needles = ['a', 'c', 'g']; $myString = 'abcdefh'; var_dump(searchString($needles, $myString)); function searchString(array $needles, string $haystack): ?array { $itemsFound = []; foreach($needles as $needle) { if (strpos($haystack, $needle) !== false) { $itemsFound[] = $needle; } } return $itemsFound; }
Output for 7.1.25 - 7.1.30, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(2) { [0]=> string(1) "a" [1]=> string(1) "c" }

preferences:
99.67 ms | 1431 KiB | 4 Q