Email Address Checker

This function check if an e-mail address is valid or not.

function valid_email($email)
{
    return preg_match('/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/',
        $email);
}
 
echo valid_email('test@test.com');

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