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How to add Captcha to PHP form??


reflex84

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Hi,

 

I really need to add a captcha to this PHP process form?

 

How do I go about doing this?

 

<?php

// Define some constants

define( "RECIPIENT_NAME", "John Smith" );

define( "RECIPIENT_EMAIL", "[email protected]" );

define( "EMAIL_SUBJECT", "Visitor Message" );

// Read the form values

$success = false;

$senderName = isset( $_POST['senderName'] ) ? preg_replace( "/[^\.\-\' a-zA-Z0-9]/", "", $_POST['senderName'] ) : "";

$senderEmail = isset( $_POST['senderEmail'] ) ? preg_replace( "/[^\.\-\_\@a-zA-Z0-9]/", "", $_POST['senderEmail'] ) : "";

$message = isset( $_POST['message'] ) ? preg_replace( "/(From:|To:|BCC:|CC:|Subject:|Content-Type:)/", "", $_POST['message'] ) : "";

// If all values exist, send the email

if ( $senderName && $senderEmail && $message ) {

  $recipient = RECIPIENT_NAME . " <" . RECIPIENT_EMAIL . ">";

  $headers = "From: " . $senderName . " <" . $senderEmail . ">";

  $success = mail( $recipient, EMAIL_SUBJECT, $message, $headers );

}

// Return an appropriate response to the browser

if ( isset($_GET["ajax"]) ) {

  echo $success ? "success" : "error";

} else {

?>

<html>

  <head>

    <title>Thanks!</title>

  </head>

  <body>

  <?php if ( $success ) echo "<p>Thanks for sending your message! We'll get back to you shortly.</p>" ?>

  <?php if ( !$success ) echo "<p>There was a problem sending your message. Please try again.</p>" ?>

  <p>Click your browser's Back button to return to the page.</p>

  </body>

</html>

<?php

}

?>

 

??

 

Thanks in advance!

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