Comparing numbers in an array with a twist

[deregular]

Ok so i have two arrays..

eg..

$items[] contains

1
11
2
7
98
etc..

$catalogue[] contains

s1
L11
s2
XL7
m98
etc..

What I am looking to do is compare both,
If $catalogue[] contains a match with one of the items in $items[]
then i need to alter the $items[] array item to the same thats in $catalogue[]..

Humbling myself here, i have no idea which array functions or anything to use.

Another problem would be if I am looking for '1' from the $items[] array, Im presuming 2 matches would appear. ('s1','L11') .

How would I get around this?

Thanks in advance.

[suntra]

http://www.php.net/array#array.seealso