Sunday, April 30, 2017 06:55 am EDT

PHP Email Address Validation

Bri's picture

Email address validation is a very common thing and it's pretty easy in php 5.2 or greater. You no longer need to use a regular expression. You can use this simple script below, making use of the filter_var function.

$email = '';
$validation = filter_var($email, FILTER_VALIDATE_EMAIL);

$output = 'proper email address';
$output = 'wrong email address';

echo $output;

The filter_var function will return the filtered data if it passes, or False if it doesn't pass. If you want something even more advanced, try the following:

if (isValidEmail($email))
echo "Hooray! Adress is correct.";
echo "Sorry! No way.";

function isValidEmail($email)
//Perform a basic syntax-Check
//If this check fails, there's no need to continue
if(!filter_var($email, FILTER_VALIDATE_EMAIL))
return false;

//extract host
list($user, $host) = explode("@", $email);
//check, if host is accessible
if (!checkdnsrr($host, "MX") && !checkdnsrr($host, "A"))
return false;

return true;

This one not only checks if the format of the email address is correct, it also performs a test to see if the host exists.


Anonymous's picture

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