CODEWITHSUNDEEP
phpformscaptcha
Adam
Adam

Reputation: 1459

Invisible CAPTCHA not working, most likely incorrect PHP?

I am trying to incorporate an invisible CAPTCHA into my contact form, however I am not sure if it works.

My code is as follows...

HTML

<span class="test-field"><label for="test">Please leave blank</label>
  <input type="text" name="test" id="test"/></span>

CSS

.test-field {Display: none}

PHP

    <?php
if($_POST["test"]!=""){
    header("Location: {$_SERVER[HTTP_REFERER]}");exit;
}
// Get Data 
$f_name = strip_tags($_POST['f_name']);
$f_email = strip_tags($_POST['f_email']);
$f_message = strip_tags($_POST['f_msg']);

// Send Message
mail( "[email protected]", "Website Contact",
"Name: $f_name\nEmail: $f_email\nMessage: $f_message\n",
"From: My Website" );

?>

To test it, I did a few tests changing the...

f($_POST["test"]!="")

...to...

f($_POST["test"]="")

My PHP is not very good, but I am guessing this should not send the form through if the field is blank, but it does come through. Is there anything wrong with my PHP?

Thanks in advance.

Upvotes: 0

Views: 416

Answers (2)

Edward J Beckett
Edward J Beckett

Reputation: 5140

As far as your specific question it doesn't make any sense. A user CAPTCHA is absolutely useless if it's hidden.

The term CAPTCHA stands for ...

Completely Automatic Public Turing Test to Tell Computers and Humans Apart

Notice it says humans ...

How can we test for human interaction if they can't see the CAPTCHA challenge? You Can't. Never-the-less .... here's a quick mock up of your code ... the CAPTCHA I left out since it make no sense. Take it from here ... 

<?php

if ($_POST['test'] == "") {

    header("Location: {$_SERVER['HTTP_REFERER']}");


} else {

    // Get Data
    $f_name = strip_tags($_POST['f_name']);
    $f_email = strip_tags($_POST['f_email']);
    $f_message = strip_tags($_POST['f_msg']);

}

?>

<html>
<head>
    <style type="text/css">

        #demo {

            width: 250px;
            height: 250px;
        }

        .test-field {
            display: none;
            width: 200px;
            height: 200px;

        }

        #form label {
            width: 50px;
            float: left;

        }

        #form input {
            width: 150px;
            float: right;

        }


    </style>

</head>


<body>

<div id="demo">
    <form name="form" id="form" action="<?php $_SERVER['PHP_SELF'] ?>" method="post">
        <label for="test">Empty </label><input type="text" name="test" id="test"/><br/>
        <label for="f_name">Name</label><input type="text" name="f_name" id="f_name"/><br/>
        <label for="f_email">Email</label><input type="text" name="f_email" id="f_email"/><br/>
        <label for="f_msg">Message</label><textarea rows="15" cols="30" name="f_msg" id="f_msg"></textarea>
        <input type="submit" id="submit">

        <div class="test-field"></div>
    </form>
</div>
</body>

</html>

<?php var_dump($_POST) ?>

Upvotes: 2

Michael Mior
Michael Mior

Reputation: 28752

Try changing

if($_POST["test"]!=""){

to

if(isset($_POST["test"]) && $_POST["test"]){

Upvotes: 1

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