@ISALNUM[string]: Returns 1 if string is entirely composed of alphabetic (a-z, A-Z) and/or numeric (0 - 9) characters; 0 otherwise.

 

See also: @ISALPHA, @ISASCII, @ISCNTRL, @ISDIGIT, @ISPRINT, @ISPUNCT, @ISSPACE, @ISXDIGIT.

 

Example:

 

echo %@isalnum[123abc]

1

 

echo %@isalnum[123 abc]

0

 

echo %@isalnum[123.456]

0