- array_chunk: documentation ( source)
- print_r: documentation ( source)
<?php
$input = array (
"group_name_1" => "audi",
"group_locations_1" => "tokyo,barcelona,paris",
"group_quantities_at_locations_1" => "1,2,7",
"group_name_2" => "ford",
"group_locations_2" => "london,prag",
"group_quantities_at_locations_2" => "3,6"
);
print_r(array_chunk($input,3));