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Download extension manually using pear/mage

Pear for 1.4, mage for 1.5. File downloaded into /downloader/.cache/community/

./pear download magento-community/Shipping_Agent ./mage download community Shipping_Agent

Clear cache/reindex

<?php
// clear cache
Mage::app()->removeCache('catalog_rules_dirty');
// reindex prices
Mage::getModel('index/process')->load(2)->reindexEverything();
/*
1 = Product Attributes
2 = Product Attributes
3 = Catalog URL Rewrites
4 = Product Flat Data
5 = Category Flat Data
6 = Category Products
7 = Catalog Search Index
8 = Tag Aggregation Data
9 = Stock Status
*/
?>

Load category by id

<?php
$_category = Mage::getModel('catalog/category')->load(89);
$_category_url = $_category->getUrl();
?>

Load product by id or sku

<?php
$_product_1 = Mage::getModel('catalog/product')->load(12);
$_product_2 = Mage::getModel('catalog/product')->loadByAttribute('sku','cordoba-classic-6-String-guitar');
?>

Get Configurable product's Child products

<?php
// input is $_product and result is iterating child products
$childProducts = Mage::getModel('catalog/product_type_configurable')->getUsedProducts(null, $product);
?>

Get Configurable product's Children's (simple product) custom attributes

<?php
// input is $_product and result is iterating child products
$conf = Mage::getModel('catalog/product_type_configurable')->setProduct($_product);
$col = $conf->getUsedProductCollection()->addAttributeToSelect('*')->addFilterByRequiredOptions();
foreach($col as $simple_product){
    var_dump($simple_product->getId());
}
?>

Log to custom file

<?php Mage::log('Your Log Message', Zend_Log::INFO, 'your_log_file.log'); ?>

Call Static Block

<?php echo $this->getLayout()->createBlock('cms/block')->setBlockId('block-name')->toHtml(); ?>

Add JavaScript to page

First approach: page.xml - you can add something like

<action method="addJs"><script>path/to/my/file.js</script></action>

Second approach: Find page/html/head.phtml in your theme and add the code directly to page.html.

Third approach: If you look at the stock page.html mentioned above, you'll see this line

<?php echo $this->getChildHtml() ?>

Normally, the getChildHtml method is used to render a specific child block. However, if called with no paramater, getChildHtml will automatically render all the child blocks. That means you can add something like.

<!-- existing line --> 
<block type="page/html_head" name="head" as="head">
    <!-- new sub-block you're adding --> 
    <block type="core/template" name="mytemplate" as="mytemplate" template="page/mytemplate.phtml"/>
</block>
to page.xml, and then add the mytemplate.phtml file. Any block added to the head block will be automatically 
rendered. (this automatic rendering doesn't apply for all layout blocks, only for blocks where getChildHtml 
is called without paramaters).

Check if customer is logged in

    <?php $logged_in = Mage::getSingleton('customer/session')->isLoggedIn(); // (boolean) ?>

Get the current category/product/cms page

    <?php
    $currentCategory = Mage::registry('current_category');
    $currentProduct = Mage::registry('current_product');
    $currentCmsPage = Mage::registry('cms_page');
    ?>

Run Magento Code Externally

<?php
    require_once('app/Mage.php'); //Path to Magento
    umask(0);
    Mage::app();
    // Run you code here
?>

Programmatically change Magento’s core config data

<?php
    // find 'path' in table 'core_config_data' e.g. 'design/head/demonotice'
    $my_change_config = new Mage_Core_Model_Config();
    // turns notice on
    $my_change_config->saveConfig('design/head/demonotice', "1", 'default', 0);
    // turns notice off
    $my_change_config->saveConfig('design/head/demonotice', "0", 'default', 0);
?>```


## Changing the Admin URL ##

Open up the `/app/etc/local.xml` file, locate the `<frontName>` tag, and change the ‘admin’ part it to something a lot more random, eg:

```xml
        <frontName><![CDATA[supersecret-admin-name]]></frontName>
    Clear your cache and sessions.

Magento: Mass Exclude/Unexclude Images

    By default, Magento will check the 'Exclude' box for you on all imported images, making them not show up as a thumbnail under the main product image on the product view.

        # Mass Unexclude
        UPDATE`catalog_product_entity_media_gallery_value` SET `disabled` = '0' WHERE `disabled` = '1';
        # Mass Exclude
        UPDATE`catalog_product_entity_media_gallery_value` SET `disabled` = '1' WHERE `disabled` = '0';

getBaseUrl – Magento URL Path

        <?php
        // http://example.com/
        echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_WEB);
        // http://example.com/js/
        echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_JS);
        // http://example.com/index.php/
        echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_LINK);
        // http://example.com/media/
        echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA);
        // http://example.com/skin/
        echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_SKIN);
        ?>

Get The Root Category In Magento

        <?php
        $rootCategoryId = Mage::app()->getStore()->getRootCategoryId();
        $_category = Mage::getModel('catalog/category')->load($rootCategoryId);
        // You can then get all of the top level categories using:
        $_subcategories = $_category->getChildrenCategories();
        ?>

Get The Current URL In Magento

        <?php echo Mage::helper('core/url')->getCurrentUrl(); ?>

Category Navigation Listings in Magento

    Make sure the block that you’re working is of the type catalog/navigation. If you’re editing catalog/navigation/left.phtml then you should be okay.

        <div id="leftnav">
            <?php $helper = $this->helper('catalog/category') ?>
            <?php $categories = $this->getStoreCategories() ?>
            <?php if (count($categories) > 0): ?>
                <ul id="leftnav-tree" class="level0">
                    <?php foreach($categories as $category): ?>
                        <li class="level0<?php if ($this->isCategoryActive($category)): ?> active<?php endif; ?>">
                            <a href="<?php echo $helper->getCategoryUrl($category) ?>"><span><?php echo $this->escapeHtml($category->getName()) ?></span></a>
                            <?php if ($this->isCategoryActive($category)): ?>
                                <?php $subcategories = $category->getChildren() ?>
                                <?php if (count($subcategories) > 0): ?>
                                    <ul id="leftnav-tree-<?php echo $category->getId() ?>" class="level1">
                                        <?php foreach($subcategories as $subcategory): ?>
                                            <li class="level1<?php if ($this->isCategoryActive($subcategory)): ?> active<?php endif; ?>">
                                                <a href="<?php echo $helper->getCategoryUrl($subcategory) ?>"><?php echo $this->escapeHtml(trim($subcategory->getName(), '- ')) ?></a>
                                            </li>
                                        <?php endforeach; ?>
                                    </ul>
                                    <script type="text/javascript">decorateList('leftnav-tree-<?php echo $category->getId() ?>', 'recursive')</script>
                                <?php endif; ?>
                            <?php endif; ?>
                        </li>
                    <?php endforeach; ?>
                </ul>
                <script type="text/javascript">decorateList('leftnav-tree', 'recursive')</script>
            <?php endif; ?>
        </div>

Debug using zend

        <?php echo Zend_Debug::dump($thing_to_debug, 'debug'); ?>

$_GET, $_POST & $_REQUEST Variables

        <?php
        // $_GET
        $productId = Mage::app()->getRequest()->getParam('product_id');
        // The second parameter to getParam allows you to set a default value which is returned if the GET value isn't set
        $productId = Mage::app()->getRequest()->getParam('product_id', 44);
        $postData = Mage::app()->getRequest()->getPost();
        // You can access individual variables like...
        $productId = $postData['product_id']);
?>

Get methods of an object

    First, use `get_class` to get the name of an object's class.

        <?php $class_name = get_class($object); ?>
    Then, pass that `get_class_methods` to get a list of all the callable methods on an object

        <?php
        $class_name = get_class($object);
        $methods = get_class_methods($class_name);
        foreach($methods as $method)
        {
            var_dump($method);
        }
        ?>

Is product purchasable?

        <?php if($_product->isSaleable()) { // do stuff } ?>

Load Products by Category ID

        <?php
        $_category = Mage::getModel('catalog/category')->load(47);
        $_productCollection = $_category->getProductCollection();
        if($_productCollection->count()) {
            foreach( $_productCollection as $_product ):
                echo $_product->getProductUrl();
                echo $this->getPriceHtml($_product, true);
                echo $this->htmlEscape($_product->getName());
            endforeach;
        }
        ?>

Update all subscribers into a customer group (e.g. 5)

        UPDATE
        customer_entity,
        newsletter_subscriber
        SET
        customer_entity.`group_id` = 5
        WHERE
        customer_entity.`entity_id` = newsletter_subscriber.`customer_id`
        AND
        newsletter_subscriber.`subscriber_status` = 1;

Get associated products

    In /app/design/frontend/default/site/template/catalog/product/view/type/

        <?php $_helper = $this->helper('catalog/output'); ?>
        <?php $_associatedProducts = $this->getAllowProducts() ?>
        <?php //var_dump($_associatedProducts); ?>
        <br />
        <br />
        <?php if (count($_associatedProducts)): ?>
            <?php foreach ($_associatedProducts as $_item): ?>
                <a href="<?php echo $_item->getProductUrl() ?>"><?php echo $_helper->productAttribute($_item, $_item->getName(), 'name') ?> | <?php echo $_item->getName() ?> | <?php echo $_item->getPrice() ?></a>
                <br />
                <br />
            <?php endforeach; ?>
        <?php endif; ?>

Get An Array of Country Names/Codes in Magento

        <?php
        $countryList = Mage::getResourceModel('directory/country_collection')
            ->loadData()
            ->toOptionArray(false);

        echo '<pre>';
        print_r( $countryList);
        exit('</pre>');
        ?>

Create a Country Drop Down in the Frontend of Magento

        <?php
        $_countries = Mage::getResourceModel('directory/country_collection')
            ->loadData()
            ->toOptionArray(false) ?>
        <?php if (count($_countries) > 0): ?>
            <select name="country" id="country">
                <option value="">-- Please Select --</option>
                <?php foreach($_countries as $_country): ?>
                    <option value="<?php echo $_country['value'] ?>">
                        <?php echo $_country['label'] ?>
                    </option>
                <?php endforeach; ?>
            </select>
        <?php endif; ?>

Create a Country Drop Down in the Magento Admin

        <?php
        $fieldset->addField('country', 'select', array(
            'name'  => 'country',
            'label'     => 'Country',
            'values'    => Mage::getModel('adminhtml/system_config_source_country')->toOptionArray(),
        ));
        ?>

Return Product Attributes

        <?php
        $_product->getThisattribute();
        $_product->getAttributeText('thisattribute');
        $_product->getResource()->getAttribute('thisattribute')->getFrontend()->getValue($_product);
        $_product->getData('thisattribute');
        // The following returns the option IDs for an attribute that is a multiple-select field:
        $_product->getData('color'); // i.e. 456,499
        // The following returns the attribute object, and instance of Mage_Catalog_Model_Resource_Eav_Attribute:
        $_product->getResource()->getAttribute('color'); // instance of Mage_Catalog_Model_Resource_Eav_Attribute
        // The following returns an array of the text values for the attribute:
        $_product->getAttributeText('color') // Array([0]=>'red', [1]=>'green')
// The following returns the text for the attribute
if ($attr = $_product->getResource()->getAttribute('color')):
    echo $attr->getFrontend()->getValue($_product); // will display: red, green
endif;
?>

Cart Data

        <?php
        $cart = Mage::getModel('checkout/cart')->getQuote()->getData();
        print_r($cart);
        $cart = Mage::helper('checkout/cart')->getCart()->getItemsCount();
        print_r($cart);
        $session = Mage::getSingleton('checkout/session');
        foreach ($session->getQuote()->getAllItems() as $item) {
            echo $item->getName();
            Zend_Debug::dump($item->debug());
        }
        ?>

Get Simple Products of a Configurable Product

        <?php
        if($_product->getTypeId() == "configurable") {
            $ids = $_product->getTypeInstance()->getUsedProductIds();
            ?>
            <ul>
                <?php
                foreach ($ids as $id) {
                    $simpleproduct = Mage::getModel('catalog/product')->load($id);
                    ?>
                    <li>
                        <?php
                        echo $simpleproduct->getName() . " - " . (int)Mage::getModel('cataloginventory/stock_item')->loadByProduct($simpleproduct)->getQty();
                        ?>
                    </li>
                <?php
                }
                ?>
            </ul>
        <?php
        }
        ?>

Turn template hints on/off via database

        UPDATE
        `core_config_data`
        SET
        `value` = 0
        WHERE
        `path` = "dev/debug/template_hints"
        OR
        `path` = "dev/debug/template_hints_blocks";

Delete all products

        DELETE FROM `catalog_product_entity`;
        -- thanks to https://gist.github.com/paales

Getting Configurable Product from Simple Product ID in Magento 1.5+

        <?php
        $simpleProductId = 465;
        $parentIds = Mage::getResourceSingleton('catalog/product_type_configurable')
            ->getParentIdsByChild($simpleProductId);
        $product = Mage::getModel('catalog/product')->load($parentIds[0]);
        echo $product->getId(); // ID = 462 (aka, Parent of 465)
        ?>