string_letters

With this function you can remove all characters that are not classed as letters. This is handy for preventing people from entering unwanted characters into a text entry (like entering "#" to force a new line).

NOTE This function only detects and returns the 26 letter English alphabet from A - Z (upper or lower case).

Syntax:

string_letters(string);

Returns:

String

Example:

username = string_letters(username);

The above code will set the "username" variable to only hold the letter characters of the original string (id the original string was "MacSw33ny" the returned string would be "MacSwny").