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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$arr1 = [2,3,4];
$arr2 = [1,2,3,4];
print_r(array_intersect($arr1, $arr2));
$arr1 = [2,3,4];
$arr2 = [4];
print_r(array_intersect($arr1, $arr2));