Email Validation: if(!filter_var($email, FILTER_VALIDATE_EMAIL)) { echo “E-mail is not valid”; } Integer Validation: is_int($var) or is_integer($var) Returns true/false Valid: 2, 4, 10 Invalid: “2″, 2.5 Float Validation: is_float($var) Returns true/false Valid: 11.5, 1e4 Invalid: “2.5″, 4, 0 Numeric Validation: is_numeric($var) Returns true/false Valid: 40, 1e4, 1550, 9.5 Invalid: “2.5″ String Validation: [...]![]()
