3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array1 = array('a'); $array2 = array('p1', 'p2', 'p3'); $array1 = array_merge($array1, count ($array2) > count($array1) ? array_fill(0, count ($array2) - count($array1), '*') : array()); print_r($array1); print_r($array2); print_r(array_combine($array2, $array1));

preferences:
41.63 ms | 402 KiB | 5 Q