PHP array_intersect

1 <?php
2 $array1 = [‘a‘ => 1,‘b‘ => true,‘c‘ => ‘2‘,‘d‘ => false];
3 $array2 = [‘1‘,2,0];
4 var_dump(array_intersect($array1,$array2));

 1 <?php
 2 /*
 3  * http://php.net/manual/en/function.array-intersect.php
 4  */
 5 function array_union($a,$b){
 6     return array_merge(
 7         array_intersect($a, $b),
 8         array_diff($a, $b),
 9         array_diff($b, $a)
10     );
11 }