<?php
$n1=array("1","2");
$n2=array("3","4");
$n=array_merge($n1,$n2);
print_r($n);//Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 )
?>
$n1=array("one","tw0");
$n2=array("three","four");
foreach($n2 as $val){
$n1[]=$val;
}
print_r($n1);