I can remove all the non-alphanumeric characters from a given string like this

$string = ereg_replace("[^A-Za-z]", "", $string);

But I want to trim all characters from a string EXCEPT whitespace - any ideas?

No worries, I've figured it out now...

 

just in case you wanted to know - you just add any of the character types you want to keep within the parentheses.

 

$string = ereg_replace("[^A-Za-z ]", "", $string);