The Bakery Everything CakePHP

It first parses the submitted data and then checks for the existence of each tag, before deciding whether to create it or not. It expects a model called Tag in a HABTM association with the calling controller.

Save this as /app/controllers/components/tagging.php and include it in your $components array.

Component Class:

Download code <?php 
class TaggingComponent extends Object
{
function tagParse($tagdump) {
    // first we need to split the tags up and strip whitespace at the beginning and end
    // not ALL whitespace as we're allowing multiple word tags
    $tempTagArray = preg_split('/,/',$tagdump);
    $tagArray = array();
    foreach ($tempTagArray as $t) {
        $t = trim($t);
        if (strlen($t)>0) {
            $tagArray[] = $t;
        }
    }
    $Tag = new Tag; // create a new Tag object
    $tagInfo = array(); // create a new array to store tag id and name combo's from db
    foreach ($tagArray as $t) {
        if ($res = $Tag->findByName($t)) {
            // tag exists already, add it to our array
            $tagInfo[] = $res['Tag']['id'];
        } else {
            // tag doesn't exist, lets add it
            $Tag->save(array('id'=>'','name'=>$t));
            // now we can add this to our array
            $tagInfo[] = sprintf($Tag->getLastInsertID());
        }
        unset($res);
    }
    return $tagInfo;
}

}
?>
Usage:

Controller Class:

Download code <?php 
...
$this->params[’data’][’Tag’][’Tag’] = $this->Tagging->tagParse($theTagField);
...
?>
This will parse the data back into the correct form for simply doing a...

Controller Class:

Download code <?php 
...
$this->controller->save($this->params[’data’]);
...
?>
(originally posted at http://ben.milleare.com/2006/08/29/tagging-in-cakephp/)