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I am not very good at PHP however I am trying to edit a php function for Magento.

$categoryID = $this->getCategoryId(); //the value is like 7,3,6,9
$cats = explode(',', $categoryID);

$collection = Mage::getModel('catalog/product')
    ->joinField('category_id', 'catalog/category_product', 'category_id', 'product_id = entity_id', null, 'left')
    ->addAttributeToFilter('category_id', array(
        array('finset' => '7'),
        array('finset' => '3'),
        array('finset' => '6'),
        array('finset' => '9')

I want to generate the below part automatically based on the value(s) of $cats


array('finset' => '7'),
array('finset' => '3'),

array('finset' => '6'),

array('finset' => '9')


How can I do it, urgent help will be extremely appreciated.


Thanks in advance


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