CODEWITHSUNDEEP
phpcodeigniter
Dikshant Ghimire
Dikshant Ghimire

Reputation: 85

Recursion in codeigniter?

I am trying to have a menu where the parent category can have as many child categories. The child categories can have as many sub child categories and so on......

Eg:

any insight for this ???

PS. Using Codeigniter HMVC

Currently I am working by :

Using a helper function...

I can view 2 level nested categories by the following code:

<ul>
    <?php foreach($results as $row){ ?>
    <li>
        <?php echo $row->cat_title; ?>
        <?php 
        $childs = get_child_cat_by_id($row->cat_id);
        if(!empty($childs)){ ?>

        <ul>
            <?php  
            foreach($childs as $child){ ?>
            <li><?php echo $child->cat_title; ?>  
                <?php 
                $sub_child = get_sub_childs($child->cat_id);
                if(!empty($sub_child)){ ?>
                <ul>
                    <?php  
                    foreach($sub_child as $children){ ?>
                    <li><?php echo $children->cat_title; ?>  </li>
                    <?php }?>
                </ul>
                <?php } ?>

            </li>
            <?php }?>
        </ul>
        <?php } ?>

    </li>
    <?php } ?>
</ul>

this code is used in the view. i need a recursive method so that the function get_child_cat_by_id need not be called many times.

Upvotes: 1

Views: 1875

Answers (1)

lracicot
lracicot

Reputation: 364

The best solution I have for your problem would be to use an ORM supproting hierarchical data like Doctrine 2 or Rapid Data Mapper with the nested set extention

But a simpler solution would be to get a nested array of your data (deal with your model for that) and try something like:

//Make a list from an array 
function nestedArrayToList($array, $property)
{
    $output = '<ul>';

    foreach ($array as $key => $mixedValue) { 
        if (is_array($mixedValue)) {
            // Recursive step
            $output .= '<li>' . nestedArrayToList($mixedValue) . '</li>'; 
        } else {
            // Simply output the property
            $output .= '<li>' . $mixedValue->$property . '</li>'; 
        }
    } 

    $output .= '</ul>'; 

    return $output; 
}


nestedArrayToList($row)

I did not tested it, but the idea is here.

Upvotes: 1

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