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<html><body>$email = "john.doe@example.com";// Remove all illegal characters from email$email = filter_var($email, FILTER_SANITIZE_EMAIL);// Validate e-mailif (!filter_var($email, FILTER_VALIDATE_EMAIL) === false) { echo("$email is a valid email address");} else { echo("$email is not a valid email address");}</body></html>
john.doe@example.com is a valid email address