Check Valid Email Address - PHP Code Snippet

Check Valid Email Address – PHP Code Snippet

Starting a new series about code Snippets, In this series we share some useful code snippets of HTML, HTML5, CSS, CSS3, PHP, Javascript and jQuery snippets. We hope that these snippets will worthwhile for our readers and should help in your projects.

Today we share a PHP Code Snippets “Check valid email address”.

    $email = $_POST['email'];
    if(filter_var($email, FILTER_VALIDATE_EMAIL)){
        echo '<p>This is a valid email.<p>';
        echo '<p>This is an invalid email.</p>';

<form action="" method="post">
    Email: <input type="text" name="email" value=" <?php echo $_POST['email']; ?> ">
    <input type="submit" value="Check Email">


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  1. Reply Joao Paulo Pinheiro March 5, 2014 at 3:16 am

    • Carbonize March 5, 2014 at 2:01 pm

      All you are doing there is checking if the domain used in the email address exists and accepts email. It doesn’t prove that the email address in question actually exists. May as well just use filter_var or regex and save on the resources.

  2. Reply Alex March 5, 2014 at 3:38 am

    Note that you need to have a subdomain of a top domain or whatever its called.

    This does not work: foo@bar
    This works: foo@bar.baz

    • Carbonize March 5, 2014 at 2:02 pm

      Yes filter_var does not allow some addresses that are perfectly valid according to the RFC specs. foo@bar is actually a valid email address.

    • Lars Moelleken March 9, 2014 at 2:23 pm

      I had the problem this week : with the mail “tester@customer-ä.de” … so I will use a regex next time.

  3. Reply Carbonize March 5, 2014 at 1:56 pm

    Might as well of just posted a link to the PHP page about using filter_var. You don’t even list the available options nor do you mention any of the issues that come with using filter_var.

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