to lower case?

[stoodder]

i was wondering if there is a way to use str_replace or ereg or whatever to make the letters of a certain string to lower case???

[firepages]

$str=strtolower($str);

though thats only for the whole string , if you mean a bit of a string then you do need regex

preg_replace_callback() .. http://www.php.net/preg_replace_callback is useful as you can apply a user-fuction to all matches

[stoodder]

nope i needed the whole string thanx... its for a messageing system i have for some reason when i check the user if even one letter in their name is upper case it says the user is not authorized.