Help:php array mix(like cross of math sets)

[Sifat3d]

HI, i need help with this.

<?php
$main_array	=array('x','y');
$some_array	=array('a','b');

How can i get

$new_array=('ax','ay','bx','by');

Someone please help me, the original main_array and some_array contain too much(50 each)data and they change hourly,
So its impossible for me to do it manually, i need it done using php and i will use the new_array in a simple str_replace.
All help will be appreciated.

[something else]

$main_array = array('x','y');
$some_array = array('a','b');
$new_array = array();
$t = 0;
for ($i = 0; $i <= count($some_array)-1; $i++)
{
   for ($a = 0; $a <= count($main_array)-1; $a++)
   {
        $new_array[$t] =  $some_array[$i].$main_array[$a];
        $t++;
   }
} 

[GumSlone]

actually the same code as posted by something else

$main_array = array('x','y'); 
$some_array = array('a','b'); 

for ($i = 0; $i < count($some_array); $i++) 
{
    for ($k = 0; $k < count($main_array); $k++) 
    {
        $new_array[] =  $some_array[$i].$main_array[$k]; 
    }
}
print_r($new_array);