- print_r: documentation ( source)
- array_merge: documentation ( source)
<?php
echo "lorem Ipsum dolor sit Amet";
$array1=array("abc");
$array2=array("def");
$a1=array("red","green");
$a2=array("blue","yellow");
print_r(array_merge($a1,$a2));
$array3=array_merge($array1,$array2);
echo $array3;
?>