Invalid Argument error

Question

what is wrong with this foreach, it came with the theme but always comes up with error invalid argument, I don't do code so don't know if its a missing bit of code or missing table or what, its in the theme Helper/Data.php

public function getType(Mage_Catalog_Model_Product $product)
{
    if ('Mage_Catalog_Model_Product' != get_class($product) )
        return;
    foreach ($product->getOptionsType as $o) {
        $optionType = $o['type'];
        if ($optionType == 'file') {
            return true;
        }
    }
    return false;
}

Answer 1

Replace

if ('Mage_Catalog_Model_Product' != get_class($product) )

with

if (!($product instanceof Mage_Catalog_Model_Product))

and replace

foreach ($product->getOptionsType as $o) {

with

if ($product->getOptionsType()) {
    foreach ($product->getOptionsType() as $o) {
    ....
    }
}

Answer 2

It seems that you pass wrong type of object in getType function.

Example:

Mage::helper('yourmodule')->getType($object); 

The type hint of your function is Mage_Catalog_Model_Product, the object you pass into getType function should be instance of Mage_Catalog_Model_Product

For more detail please read follow this tutorial: http://alanstorm.com/php_primer_type_hints