<?php $array1 = array("a" => array(1)); $array2 = array("b" => array("1")); $a = array(1,2,3,4); $b = array(2,4); $c = array(1,2,3,4); $d = array(2,4); $x = array_flip($a); $y = array_flip($a); print_r($x); print_r($y); $result2 = array_intersect_key($x, $y); // 2 4 $result3 = array_intersect($c,$d); print_r($result2); print_r($result3); ?>
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