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<?php $arr1 = [1,2,3,4,5]; $arr2 = [3,7]; echo count(array_diff($arr2, $arr1)) ? 'true':'false'; echo PHP_EOL; $arr1 = [1,2,3,4,5]; $arr2 = [3,5]; echo count(array_diff($arr2, $arr1)) ? 'true':'false';
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