Email Validation Function
Written by 4 November 2022
Validating email submitted through a form is one of the most common tasks as a web developer. PHP provides an intuitive and easy way to validate email using two filters, FILTER_SANITIZE_EMAIL and FILTER_VALIDATE_EMAIL.
Code Snippet:
<!-- this script is provided by https://www.phpfreecode.com coded by: Kerixa Inc. -->
<?php
if(empty($_POST)){
if(isset($_SERVER['HTTP_REFERER'])){
header('Location: ' . $_SERVER["HTTP_REFERER"] );
}else{
header('Location: https://'. $_SERVER['SERVER_NAME']);
}
}else{
if(isset($_POST['email'])){
// Remove any illegal characters from email
$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);
// Validate if it is a valid email based on RFC822 spec
if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
/* Passes validation, continue with your business logic */
}else{
echo "Invalid email format";
}
}else{
echo "No email format found";
}
}
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