Help me to compare two string.

[vcivilen]

I have two arrays:

$arr1 = {1,2,3,4,5,6,7,8}

$arr2 = {0,3,9,10,12,14,16}

How can I find the same value between them and return the ouput array:

$outputarr = {3,9}

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Other problems:

Two string

$str1 = "1,2,3,4,5,6,7,8";

$str2 = "0,3,9,10,12,14,16";

how can I get

$stroutput = "3,9";

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I think can be use "for" or "while..do.."... but is there any quicker method ?

[soycharliente]

http://us.php.net/in_array in conjunction with a foreach loop may do the trick.

[vcivilen]

Thanks, but I just found other alternative method:

Use: array_intersect

http://us3.php.net/manual/en/function.array-intersect.php

 

Again, Thank to charlieholder so much.