<?php
$primeiro_array = ["1", "2", "3", "4"];
$segundo_array = ["1", "2"];
PD9waHAKCiAgICAkcHJpbWVpcm9fYXJyYXkgPSBbIjEiLCAiMiIsICIzIiwgIjQiXTsKICAgICRzZWd1bmRvX2FycmF5ID0gWyIxIiwgIjIiXTsKICAgIAogICAgJHRlcmNlaXJvX2FycmF5ID0gYXJyYXlfdmFsdWVzKGFycmF5X2RpZmYoJHByaW1laXJvX2FycmF5LCAkc2VndW5kb19hcnJheSkpOwogICAgCiAgICBwcmludF9yKCR0ZXJjZWlyb19hcnJheSk7