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Magento Code Snippets

Download extension manually using mage

./mage config-set preferred_state stable
./mage clear-cache
./mage sync
./mage download community Module_Name

Reindex

php -f shell/indexer.php reindexall
<?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
*/
?>

Delete cache/sessions

rm -rf var/log/*
rm -rf var/cache/*
rm -rf var/session/*
rm -rf var/report/*
rm -rf var/locks/*
rm -rf app/code/core/Zend/Cache
rm -rf var/ait_rewrite/*
rm -rf media/css/*
rm -rf media/js/*

// if there are many files which can't get deleted in once
find /path/to/session/* -mtime +1 -exec rm {} \;

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

<?= $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

<?= $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"/>
    ...

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).

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:

<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

<?= 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-<?= $category->getId(); ?>" class="level1">
                                <?php foreach($subcategories as $subcategory): ?>
                                    <li class="level1<?php if ($this->isCategoryActive($subcategory)): ?> active<?php endif; ?>">
                                        <a href="<?= $helper->getCategoryUrl($subcategory); ?>"><?= $this->escapeHtml(trim($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

<?= 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;
}
?>

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="<?= $_item->getProductUrl(); ?>"><?= $_helper->productAttribute($_item, $_item->getName(), 'name'); ?> | <?= $_item->getName(); ?> | <?= $_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="<?= $_country['value']; ?>">
                <?= $_country['label']; ?>
            </option>
        <?php endforeach; ?>
    </select>
<?php endif; ?>

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;
?>

Format Price

<?php
    $formattedPrice = Mage::helper('core')->currency($_finalPrice,true,false);
}
?>

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());
    }
?>

Total items added in cart

<?php
    Mage::getModel('checkout/cart')->getQuote()->getItemsCount();
    Mage::getSingleton('checkout/session')->getQuote()->getItemsCount();
?>

Total Quantity added in cart

<?php
    Mage::getModel('checkout/cart')->getQuote()->getItemsQty();
    Mage::getSingleton('checkout/session')->getQuote()->getItemsQty();
?>

Sub Total for item added in cart

<?php
    Mage::getModel('checkout/cart')->getQuote()->getSubtotal();
    Mage::getSingleton('checkout/session')->getQuote()->getSubtotal();
?>

Grand total for item added in cart

<?php
    Mage::helper('checkout')->formatPrice(Mage::getModel('checkout/cart')->getQuote()->getGrandTotal());
    Mage::helper('checkout')->formatPrice(Mage::getSingleton('checkout/session')->getQuote()->getGrandTotal());
?>

Sub total of cart inkl tax without shipping

<?php
    $quote = Mage::getSingleton('checkout/session')->getQuote();
    $items = $quote->getAllItems();
    foreach ($items as $item) {
        $priceInclVat += $item->getRowTotalInclTax();
    }
    Mage::helper('checkout')->formatPrice($priceInclVat);
?>

Get products id, name, price, quantity, etc. present in your cart

<?php
    // $items = Mage::getModel('checkout/cart')->getQuote()->getAllItems();
    $items = Mage::getSingleton('checkout/session')->getQuote()->getAllItems();

    foreach($items as $item) {
        echo 'ID: '.$item->getProductId().'<br />';
        echo 'Name: '.$item->getName().'<br />';
        echo 'Sku: '.$item->getSku().'<br />';
        echo 'Quantity: '.$item->getQty().'<br />';
        echo 'Price: '.$item->getPrice().'<br />';
        echo "<br />";
    }
?>

Get number of items in cart and total quantity in cart

<?php
    $totalItems = Mage::getModel('checkout/cart')->getQuote()->getItemsCount();
    $totalQuantity = Mage::getModel('checkout/cart')->getQuote()->getItemsQty();
?>

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>
            <?= $simpleproduct->getName() . " - " . (int)Mage::getModel('cataloginventory/stock_item')->loadByProduct($simpleproduct)->getQty(); ?>
        </li>
    <?php } ?>
</ul>
<?php } ?>

Reset Development Environment (delete orders, customers, reset ids and counters, truncate statistics)

SET FOREIGN_KEY_CHECKS=0;

-- Here's where we reset the orders 
TRUNCATE `sales_flat_order`;
TRUNCATE `sales_flat_order_address`;
TRUNCATE `sales_flat_order_grid`;
TRUNCATE `sales_flat_order_item`;
TRUNCATE `sales_flat_order_status_history`;
TRUNCATE `sales_flat_quote`;
TRUNCATE `sales_flat_quote_address`;
TRUNCATE `sales_flat_quote_address_item`;
TRUNCATE `sales_flat_quote_item`;
TRUNCATE `sales_flat_quote_item_option`;
TRUNCATE `sales_flat_order_payment`;
TRUNCATE `sales_flat_quote_payment`;
TRUNCATE `sales_flat_shipment`;
TRUNCATE `sales_flat_shipment_item`;
TRUNCATE `sales_flat_shipment_grid`;
TRUNCATE `sales_flat_invoice`;
TRUNCATE `sales_flat_invoice_grid`;
TRUNCATE `sales_flat_invoice_item`;
TRUNCATE `sendfriend_log`;
TRUNCATE `tag`;
TRUNCATE `tag_relation`;
TRUNCATE `tag_summary`;
TRUNCATE `wishlist`;
TRUNCATE `log_quote`;
TRUNCATE `report_event`;

ALTER TABLE `sales_flat_order` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_order_address` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_order_grid` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_order_item` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_order_status_history` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_quote` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_quote_address` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_quote_address_item` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_quote_item` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_quote_item_option` AUTO_INCREMENT=1;
ALTER TABLE `sendfriend_log` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_order_payment` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_quote_payment` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_shipment` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_shipment_item` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_invoice` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_invoice_grid` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_invoice_item` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_shipment_grid` AUTO_INCREMENT=1;
ALTER TABLE `tag` AUTO_INCREMENT=1;
ALTER TABLE `tag_relation` AUTO_INCREMENT=1;
ALTER TABLE `tag_summary` AUTO_INCREMENT=1;
ALTER TABLE `wishlist` AUTO_INCREMENT=1;
ALTER TABLE `log_quote` AUTO_INCREMENT=1;
ALTER TABLE `report_event` AUTO_INCREMENT=1;

-- Here's where we reset the customers
TRUNCATE `customer_address_entity`;
TRUNCATE `customer_address_entity_datetime`;
TRUNCATE `customer_address_entity_decimal`;
TRUNCATE `customer_address_entity_int`;
TRUNCATE `customer_address_entity_text`;
TRUNCATE `customer_address_entity_varchar`;
TRUNCATE `customer_entity`;
TRUNCATE `customer_entity_datetime`;
TRUNCATE `customer_entity_decimal`;
TRUNCATE `customer_entity_int`;
TRUNCATE `customer_entity_text`;
TRUNCATE `customer_entity_varchar`;
TRUNCATE `log_customer`;
TRUNCATE `log_visitor`;
TRUNCATE `log_visitor_info`;

ALTER TABLE `customer_address_entity` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_datetime` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_decimal` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_int` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_text` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_varchar` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_datetime` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_decimal` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_int` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_text` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_varchar` AUTO_INCREMENT=1;
ALTER TABLE `log_customer` AUTO_INCREMENT=1;
ALTER TABLE `log_visitor` AUTO_INCREMENT=1;
ALTER TABLE `log_visitor_info` AUTO_INCREMENT=1;

-- This is to Reset all the ID counters
TRUNCATE `eav_entity_store`;
ALTER TABLE `eav_entity_store` AUTO_INCREMENT=1;

SET FOREIGN_KEY_CHECKS=1;

TRUNCATE TABLE `sales_bestsellers_aggregated_daily`;
TRUNCATE TABLE `sales_bestsellers_aggregated_monthly`;
TRUNCATE TABLE `sales_bestsellers_aggregated_yearly`;

DELETE FROM report_event WHERE event_type_id IN (SELECT event_type_id FROM report_event_types WHERE event_name IN ('catalog_product_view'));

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;

Set german address format

INSERT INTO `directory_country_format` (`country_format_id`, `country_id`, `type`, `format`) VALUES
(1, 'DE', 'html', '{{depend prefix}}{{var prefix}} {{/depend}}{{var firstname}} {{depend middlename}}{{var middlename}} {{/depend}}{{var lastname}}{{depend suffix}} {{var suffix}}{{/depend}}<br/>\r\n{{depend company}}{{var company}}<br />{{/depend}}\r\n{{if street1}}{{var street1}}{{/if}}\r\n{{depend street2}}{{var street2}}<br />{{/depend}}\r\n{{depend street3}}{{var street3}}<br />{{/depend}}\r\n{{depend street4}}{{var street4}}<br />{{/depend}}\r\n{{if postcode}}{{var postcode}}{{/if}} {{if city}}{{var city}}{{/if}}<br/>\r\n{{var country}}<br/>\r\n{{depend telephone}}Tel.: {{var telephone}}{{/depend}}\r\n{{depend fax}}<br/>Fax: {{var fax}}{{/depend}}'),
(2, 'DE', 'pdf', '{{depend prefix}}{{var prefix}} {{/depend}}{{var firstname}} {{depend middlename}}{{var middlename}} {{/depend}}{{var lastname}}{{depend suffix}} {{var suffix}}{{/depend}}|\r\n{{depend company}}{{var company}}|{{/depend}}\r\n{{if street1}}{{var street1}} {{/if}}\r\n{{depend street2}}{{var street2}}|{{/depend}}\r\n{{depend street3}}{{var street3}}|{{/depend}}\r\n{{depend street4}}{{var street4}}|{{/depend}}\r\n{{if postcode}}{{var postcode}} {{/if}}{{if city}}{{var city}}{{/if}}}|\r\n{{var country}}|\r\n{{depend telephone}}Tel.: {{var telephone}}{{/depend}}|\r\n{{depend fax}}<br/>Fax: {{var fax}}{{/depend}}|'),
(3, 'DE', 'oneline', '{{depend prefix}}{{var prefix}} {{/depend}}{{var firstname}} {{depend middlename}}{{var middlename}} {{/depend}}{{var lastname}}{{depend suffix}} {{var suffix}}{{/depend}}, {{var street}}, {{var postcode}} {{var city}}, {{var country}}'),
(4, 'DE', 'text', '{{depend prefix}}{{var prefix}} {{/depend}}{{var firstname}} {{depend middlename}}{{var middlename}} {{/depend}}{{var lastname}}{{depend suffix}} {{var suffix}}{{/depend}}\r\n{{depend company}}{{var company}}{{/depend}}\r\n{{if street1}}{{var street1}} {{/if}}\r\n{{depend street2}}{{var street2}}{{/depend}}\r\n{{depend street3}}{{var street3}}{{/depend}}\r\n{{depend street4}}{{var street4}}{{/depend}}\r\n{{if postcode}}{{var postcode}} {{/if}}{{if city}}{{var city}}{{/if}}\r\n{{var country}}\r\nTel.: {{var telephone}}\r\n{{depend fax}}Fax: {{var fax}}{{/depend}}'),
(5, 'DE', 'js_template', '#{prefix} #{firstname} #{middlename} #{lastname} #{suffix}<br/>#{company}<br/>#{street0}<br/>#{street1}<br/>#{street2}<br/>#{street3}<br/>#{postcode} #{city}<br/>#{country_id}<br/>Tel.: #{telephone}<br/>Fax: #{fax}');

Setting file permissions

find </path/to/magento> -type f \-exec chmod 644 {} \;
find </path/to/magento> -type d \-exec chmod 755 {} \;

Other recommendations in "Securing Magento File & Directory Permissions" (http://blog.nexcess.net/2010/12/06/securing-magento-file-directory-permissions/)

find </path/to/magento> \-exec chown youruser.youruser {} \;
find </path/to/magento> -type f \-exec chmod 644 {} \;
find </path/to/magento> -type d \-exec chmod 711 {} \;
find </path/to/magento> -type f -name "*.php" \-exec chmod 600 {} \;
chmod 600 </path/to/magento>/app/etc/*.xml

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)
?>

Get all associated children product of a configurable product

<?php
    /**
    * Load product by product id
    */
    $product = Mage::getModel('catalog/product')->load(YOUR_PRODUCT_ID);

    /**
    * Get child products id (only ids)
    */
    $childIds = Mage::getModel('catalog/product_type_configurable')->getChildrenIds($product->getId());

    /**
    * Get children products (all associated children products data)
    */
    $childProducts = Mage::getModel('catalog/product_type_configurable')->getUsedProducts(null,$product);
?>

Get parent id of simple product associated to configurable product

<?php
    $_product = Mage::getModel('catalog/product')->load(YOUR_SIMPLE_PRODUCT_ID);
    $parentIdArray = $_product->loadParentProductIds()->getData('parent_product_ids');
    print_r($parentIdArray);
?>

Check if customer is logged in

<?php
    $_customer = Mage::getSingleton('customer/session')->isLoggedIn();
    if ($_customer) {}
?>

Get product image

<?= $this->helper('catalog/image')->init($_product, 'image'); ?>

Downsize large product images but not enlarge small images

<?php
    $this->helper('catalog/image')
        ->init($_product, 'image')
        ->keepFrame(false) // avoids getting the small image in original size on a solid background color presented (can be handy not to break some layouts)
        ->constrainOnly(true) // avoids getting small images bigger
        ->resize(650); // sets the desired width and the height accordingly (proportional by default)
?>

No square (white background) product images

<img src="<?php echo $this->helper('catalog/image')->init($this->getProduct(), 'thumbnail', $_image->getFile())->backgroundcolor('000', '000', '000')->resize(100); ?>" />
<img src="<?php echo $this->helper('catalog/image')->init($this->getProduct(), 'thumbnail', $_image->getFile())->keepFrame(false)->resize(100); ?>" width="100"  ... />

Show image using current skin path (PHTML)

<img src="<?= $this->getSkinUrl('images/logo.png'); ?>" alt="logo" />

Show image using current skin path (CMS)

<img src={{skin url="images/logo.png"}}  />

Show CMS block (PHTML)

<?= $this->getLayout()->createBlock('cms/block')->setBlockId('my_block_identifier')->toHtml(); ?>

Get Customer Shipping/Billing Address

<?php
    $customerAddressId = Mage::getSingleton('customer/session')->getCustomer()->getDefaultShipping();
    if ($customerAddressId){
        $address = Mage::getModel('customer/address')->load($customerAddressId);
    }
?>

Get Product image path

<?php
    $productId = 1;
    $product = Mage::getModel('catalog/product')->load($productId);
    $path = Mage::helper('catalog/image')->init($product, 'image')->resize(75, 75);
?>

Get product URL

<?php
    $productId = 1;
    $product = Mage::getModel('catalog/product')->load($productId);
    $path = Mage::getUrl().$product->getUrlPath();
?>

Get Category URL

<?= Mage::getModel('catalog/category')->load($categoryId)->getUrl(); ?>

Get product stock quantity

<?php
    $id = 52;
    $_product = Mage::getModel('catalog/product')->load($id);

    // or load it by SKU
    // $sku = "microsoftnatural";
    // $_product = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);

    $stock = Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product);

    print_r($stock->getData());

    echo $stock->getQty();
    echo $stock->getMinQty();
    echo $stock->getMinSaleQty();
?>

Get actual price and special price of a product

<?php
    $_productId = 52;
    $_product = Mage::getModel('catalog/product')->load($_productId);

    // without currency sign
    $_actualPrice = number_format($_product->getPrice(), 2);
    // with currency sign
    $_formattedActualPrice = Mage::helper('core')->currency(number_format($_product->getPrice(), 2),true,false);

    // without currency sign
    $_specialPrice = $_product->getFinalPrice();
    // with currency sign
    $_formattedSpecialPrice = Mage::helper('core')->currency(number_format($_product->getFinalPrice(), 2),true,false);
?>

Get Currency Symbol

<?= Mage::app()->getLocale()->currency(Mage::app()->getStore()->getCurrentCurrencyCode())->getSymbol(); ?>

Get Currency Code

<?= Mage::app()->getStore()->getCurrentCurrencyCode(); ?>

Track Visitor’s Information

<?php
    $visitorData = Mage::getSingleton('core/session')->getVisitorData();
    print_r($visitorData);

    // Array
    // (
    // [] =>
    // [server_addr] => 167772437
    // [remote_addr] => 167772437
    // [http_secure] =>
    // [http_host] => 127.0.0.1
    // [http_user_agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.237 Safari/534.10
    // [http_accept_language] => en-US,en;q=0.8
    // [http_accept_charset] => ISO-8859-1,utf-8;q=0.7,*;q=0.3
    // [request_uri] => /magento/index.php/catalog/category/view/id/22
    // [session_id] => 13qm5u80238vb15lupqcac97r5
    // [http_referer] => http://127.0.0.1/magento/
    // [first_visit_at] => 2011-01-17 11:42:23
    // [is_new_visitor] =>
    // [last_visit_at] => 2011-01-17 11:58:38
    // [visitor_id] => 41
    // [last_url_id] => 139
    // )

    // user's ip address (visitor's ip address)
    $remoteAddr = Mage::helper('core/http')->getRemoteAddr(true);

    // server's ip address (where the current script is)
    $serverAddr = Mage::helper('core/http')->getServerAddr(true);
?>

Get / filter all products by attribute value

<?php
    /**
    * Get all products related to any particular brand
    * Let us suppose that we are fetching the products related to 'Samsung' brand
    * Let us suppose the Manufacturer ID of Samsung = 3
    */

    $manufacturerId = 3;
    $attributeCode = 'manufacturer';

    $products = Mage::getModel('catalog/product')->getCollection()->addAttributeToFilter($attributeCode, $manufacturerId);

    // print all products
    print_r($products->getItems());
?>

Check if current page is homepage

<?php
    if($this->getIsHomePage()) {
        // Homepage
    } else {
        // not on Homepage
    }

    // alternative method
    $routeName = Mage::app()->getRequest()->getRouteName();
    $identifier = Mage::getSingleton('cms/page')->getIdentifier();
    if($routeName == 'cms' && $identifier == 'home') {
        // Homepage
    } else {
        // not on Homepage
    }
?>

Convert Price from Current Currency to Base Currency and vice-versa

<?php
    $baseCurrencyCode = Mage::app()->getStore()->getBaseCurrencyCode();
    $currentCurrencyCode = Mage::app()->getStore()->getCurrentCurrencyCode();
    $price = 100;

    // convert price from current currency to base currency
    $priceOne = Mage::helper('directory')->currencyConvert($price, $currentCurrencyCode, $baseCurrencyCode); 

    // convert price from base currency to current currency
    $priceTwo = Mage::helper('directory')->currencyConvert($price, $baseCurrencyCode, $currentCurrencyCode);
?>

Changing price from any one currency to another

<?php
    $from = 'USD';
    $to = 'NPR';
    $price = 10;

    $newPrice = Mage::helper('directory')->currencyConvert($price, $from, $to);
?>

Get Currency Rates

<?php
    /**
     * Get the base currency
     */
    $baseCurrencyCode = Mage::app()->getBaseCurrencyCode();

    /**
     * Get all allowed currencies
     * returns array of allowed currency codes
     */
    $allowedCurrencies = Mage::getModel('directory/currency')->getConfigAllowCurrencies();

    /**
     * Get the currency rates
     * returns array with key as currency code and value as currency rate
     */
    $currencyRates = Mage::getModel('directory/currency')->getCurrencyRates($baseCurrencyCode, array_values($allowedCurrencies));

    $allowedCurrencies = Mage::getModel('directory/currency')->getConfigAllowCurrencies();

    /**
     * Get currency rates for Nepalese Currency
     */
    $currencyRates = Mage::getModel('directory/currency')->getCurrencyRates('NPR', array_values($allowedCurrencies));
?>

Get all categories

<?php
    $categories = Mage::getModel('catalog/category')->getCollection()->addAttributeToSelect('*');
?>

Get all active categories

<?php
    $categories = Mage::getModel('catalog/category')->getCollection()->addAttributeToSelect('*')->addIsActiveFilter();
?>

Get active categories of any particular level

<?php
    $categories = Mage::getModel('catalog/category')->getCollection()->addAttributeToSelect('*')->addIsActiveFilter()->addLevelFilter(1)->addOrderField('name');
?>

Get store specific categories

<?php
    $helper = Mage::helper('catalog/category');

    // sorted by name, fetched as collection
    $categoriesCollection = $helper->getStoreCategories('name', true, false);

    // sorted by name, fetched as array
    $categoriesArray = $helper->getStoreCategories('name', false, false);
?>

Get product in stock quantity

<?php
    $_product = Mage::getModel('catalog/product')->load($product_id);
    $qty = Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product)->getQty();
?>

Use magento "outside" magento

<?php
    require_once 'app/Mage.php';
    Mage::app($yourStoreCode);
    echo Mage::getStoreConfig('general/store_information/name');
?>

Hijack session outside magento

<?php
    require_once 'app/Mage.php';
    Mage::app($yourStoreCode);
    Mage::getSingleton('core/session', array('name'=>'frontend'))->setSessionId($_COOKIE['frontend']);
    echo "cart_id=".Mage::helper('checkout/cart')->getCart()->getQuote()->getId();
?>

Filter collection or get configurable products:

<?php
    $configurable_products = Mage::getModel('catalog/product')
        ->getCollection()
        ->addAttributeToSelect('*')
        ->addAttributeToFiler('type_id',array('eq'=>'configurable'))
        ->load();
?>

Round price

<?php
    echo Mage::getModel('sales/order')->formatPricePrecision($_product->getFinalPrice(), 3);
?>

Get a list of bestsellers

    <?php
$collection = Mage::getResourceModel('sales/report_bestsellers_collection')
        ->setModel('catalog/product')
        ->addStoreFilter(Mage::app()->getStore()->getId()) //if you want the bestsellers for a specific store view. if you want global values remove this
    ->setPageSize(5)//set the number of products you want
    ->setCurPage(1);
foreach ($collection as $_product){
    $realProduct = Mage::getModel('catalog/product')->load($_product->getProductId());
    //do something with $realProduct;
}
?>

Add category names in product view page

<?php 
    $categoryIds = $_product->getCategoryIds();
    foreach ($categoryIds as $categoryId){
        $tmpId = $categoryId;
        $categories = array();
        while($tmpId != Mage::app()->getStore()->getRootCategoryId()) {
            $category = Mage::getModel('catalog/category')->setStoreId(Mage::app()->getStore()->getId())->load($tmpId);
            $categories[] = $category;
            $tmpId = $category->getParentId();
        };
        for ($i = count($categories) - 1; $i>=0;$i--){
            echo '<a href="'.echo $categories[$i]->getUrl().'">'.echo $categories[$i]->getName().'</a>';
            if ($i>0){
                echo "-&gt;"<!-- this is the tree separator. change to whatever you like-->
            }
        }
        //break;//uncomment this if you want only one category tree to appear.
    };
?>

Different toolbar in product list / grid

<?= $this->getToolbarBlock()->setTemplate('catalog/product/list/toolbar_bottom.phtml')->toHtml(); ?>

remotely trigger Varien.Tabs Class or EasyTabs

add this to Varien.Tabs.prototype

Varien.Tabs.prototype = {
remoteTabs: function(b) {
var controlledLink = $$("#"+b+" a")[0];
this.showContent(controlledLink);
}
}
var csTablist = new Varien.Tabs('.tabs');

to fire the link remotely you can call

csTablist.remoteTabs('product_tabs_email');

where product_tabs_email is the name of the li that you want to open.

Getting Configurable Attributes (Super Attributes) of a Configurable Product

<?php 
    /**
    * Load Product you want to get Super attributes of
    */
    $product=Mage::getModel("catalog/product")->load(52520);

    /**
    * Get Configurable Type Product Instace and get Configurable attributes collection
    */
    $configurableAttributeCollection=$product->getTypeInstance()->getConfigurableAttributes();

    /**
    * Use the collection to get the desired values of attribute
    */
    foreach($configurableAttributeCollection as $attribute){
        echo "Attr-Code:".$attribute->getProductAttribute()->getAttributeCode()."<br/>";
        echo "Attr-Label:".$attribute->getProductAttribute()->getFrontend()->getLabel()."<br/>";
        echo "Attr-Id:".$attribute->getProductAttribute()->getId()."<br/>";
        var_dump($_attribute->debug()); // returns the set of values you can use the get magic method on
    }
?>

Get order information on success.phtml

<?php
$_customerId = Mage::getSingleton('customer/session')->getCustomerId();
$lastOrderId = Mage::getSingleton('checkout/session')->getLastOrderId();
$order = Mage::getSingleton('sales/order');
$order->load($lastOrderId);
$_totalData =$order->getData();
$_grand = $_totalData['grand_total'];
?>

Set custom order numbers (starting number)

update eav_entity_store
inner join eav_entity_type on eav_entity_type.entity_type_id = eav_entity_store.entity_type_id
set eav_entity_store.increment_prefix='YOURPREFIX'
set eav_entity_store.increment_last_id='YOURSTARTINGORDERNUMBER'
where eav_entity_type.entity_type_code='order';

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