GitHub - stymiee/email-validator: The Email Validator library builds upon PHP's built in `filter_var($emailAddress, FILTER_VALIDATE_EMAIL);` by adding a default MX record check. It also offers additional validation against disposable email addresses ...
PHP email validation with filter_var and regular expression
HOW TO VALIDATE FORM INPUTS BEFORE SUBMISSION USING PHP. — Hive
PHP E-Mail Validation Using filter_var By Sandip Nigam - YouTube