Testing to see if one string is contained in another

[Velocd]

Ah.

Well, strpos and stripos (case insensitive) are good for finding a substring withing a string.

www.php.net/strpos

It could be used for many things, like.. finding a username inside a post, etc.

For general iteration in a loop, it's best to parse the string into an array (if it's a list) with explode() and then use in_array(), since it's faster.