Problem:- Validating Email Address Form Input
Solution:-
<?php if ($_SERVER['REQUEST_METHOD']=='GET') {?> <form action="<?php echo htmlentities($_SERVER['SCRIPT_NAME']); ?>" method="POST" > <input type="text" name="email"><br> <input type="submit" value="Check Mail ID"> </form> <?php }else{ if (filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL)) { echo $_POST['email']; }else{ echo $_POST['email'], ' isn\'t a valid email ID'; } } ?>