- array_combine: documentation ( source)
- print_r: documentation ( source)
- array_merge: documentation ( source)
- array_fill: documentation ( source)
<?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));