Validating IDs in php using intval ()?

Hi Everyone,


I'm trying to figure out the correct syntax when trying to validate this line of code using intval ().

$id = ereg_replace("[^0-9]", "", $_GET['id']); // filter everything but numbers for securityif ($id == "") {    echo "Missing Data to Run";    exit();} 

PHP:

Below is what I think is the correct syntax but I''m getting an error message and I'm not sure what I'm doing wrong.
http://whatsmyowncarworth.com/more-practice/member_profile.php?id=10
Error message "Missing Data to Run"


(I think this is the correct way but my syntax is wrong. What's the correct syntax?)

$id = $_GET['id'] = 1;if (filter_var($id, FILTER_VALIDATE_INT) !== false){  echo "Missing Data to Run";  exit();}

PHP:

Any help would be appreciated! Thanks everyone!

 

try to use ctype_digit - Check for numeric character(s).

Returns TRUE if every character in the string text is a decimal digit, FALSE otherwise.

 

I think that PHP have an is_numeric function.

Returns TRUE if var is a number or a numeric string, FALSE otherwise.