- array_merge_recursive: documentation ( source)
- print_r: documentation ( source)
<?php
$a1 = array('first'=>'bob', 'last'=>'jones', 'age'=>'48');
$a2 = array('first'=>'sam', 'last'=>'smith', 'age'=>'41');
$a4 = array('first'=>'joe', 'last'=>'johnson', 'age'=>'33');
$a5 = array_merge_recursive($a1,$a2,$a4);
print_r($a5);