OSTWigits - Captcha

Description:

Captcha is a system plugin to produce and verify captcha images. We use freecap lib from: http://www.puremango.co.uk/cm_php_captcha_script_113.php

Download:

Available from Joomlacode here: http://joomlacode.org/gf/project/ostwigits/frs/?action=FrsReleaseBrowse&frs_package_id=2652 

Functions:

null display() -- Produces the image, see example

bool confirm( $word ) -- Confirms if the passed word matches the captcha image produced in display.

* See configuration items in plugin params

Examples (Non-Trigger):

Displaying an image:

In order to show the image, your component is used to build the data and display to user. The recommended way is to implement the following code in your controler class:

        function displayimg()
{
// By default, just display an image
$document = &JFactory::getDocument();
$doc = &JDocument::getInstance('raw');
// Swap the objects
$document = $doc;
plgSystemCaptcha::display();
}

This will produce a raw output of the image. When displaying your form, you would then just call your own component with &task=displayimg appending the url:

	    echo "<form method='post'>";
echo "<img src='/index.php?option=com_freecap&task=displayimg'><BR>";
echo "<input type='text' name='word'><BR>";
echo "<input type='submit'>";

Confirming the word:

A simple way to confirm the word would be the following code (Assuming the word is given via the post variable "word"):

	    $word = JRequest::getVar('word', false, '', 'CMD');
if (plgSystemCaptcha::confirm($word)) {
echo "You got it right<BR><BR>";
}

 

Examples (Using Trigger):

Displaying an image:

In order to show the image, your component is used to build the data and display to user. The recommended way is to implement the following code in your controler class:

        function displayimg()
{
global $mainframe;
// By default, just display an image
$document = &JFactory::getDocument();
$doc = &JDocument::getInstance('raw');
// Swap the objects
$document = $doc;
$mainframe->triggerEvent('onCaptcha_display', array());
}

This will produce a raw output of the image. When displaying your form, you would then just call your own component with &task=displayimg appending the url:

	    echo "<form method='post'>";
echo "<img src='/index.php?option=com_freecap&task=displayimg'><BR>";
echo "<input type='text' name='word'><BR>";
echo "<input type='submit'>";

Confirming the word:

A simple way to confirm the word would be the following code (Assuming the word is given via the post variable "word"):

            global $mainframe;
$return = false;
$word = JRequest::getVar('word', false, '', 'CMD');
$mainframe->triggerEvent('onCaptcha_confirm', array($word, &$return));
if ($return) {
echo "You got it right<BR><BR>";
}
Last Updated on Tuesday, 24 July 2007 20:25
 
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