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:

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>";
            }