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@ 2015-09-06T04:24:15Z

<?php
class Test {
    protected static $array = ['a', 'b', 'c'];
    
    protected static function getArray() {
        return $array;
    }
    
    public static function test($testArray) {
        return array_key_intersect($testArray, array_flip(self::getArray()));
    }
}

print_r(Test::test(['a' => 2]));

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
array_flip: documentation ( source)

preferences:dark modelive preview

38.23 ms | 402 KiB | 5 Q