how to edit

[eluser]Chris Newton[/eluser]
is_numeric checks to see if it's a number. ctype_digit checks to see if the variable's all digits: 100.1 contains a '.' which is not a number. is_int checks the type as well as the content. A form input is always a string, so ctype_digit will check to see if the string contains only numbers, which is in effect a non-typed integer. If your primary concern is that you're getting an integer value, ctype_digit will work fine. If you also want' to confirm that it's typed as an integer, you'll need to use is_int() as well... if your input is from a form or a uri string, is_int will always fail.