Magento Advisor » Tricks

PHP/GD black background bug

brady — Wed, 02 Jun 2010 17:37:36 +0000

In most cases you can edit Mage_Catalog_Model_Product_Image to change the background of your thumbnails

<br />

class Mage_Catalog_Model_Product_Image extends Mage_Core_Model_Abstract<br />

{<br />

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    protected $_backgroundColor  = array(255, 255, 255);<br />

}<br />

or you can install the

plugin from the downloads page that does effectively the same thing.

On older PHP/GD systems though, this still won't work. You will still get b

lack backgrounds no matter what color you choose. This is because there is a bug with the imagefill() GD function on older versions.

The best option is of course to upgrade your PHP. If that's not an option, for whatever reason, you can modify /lib/Varien/Image/Adapter/Gd2.php. At or near line 188, change

<br />

        return $color;<br />

<br />

		imagefilledrectangle($imageResourceTo, 0, 0, imagesx($imageResourceTo),  imagesy($imageResourceTo), $color);<br />

        return $color;<br />

And it should work.

Adding Categories to Your Magento Store

Hassan Bawab — Mon, 10 May 2010 14:17:31 +0000

If your

Magento store has a large number of products to choose from, Product Categories are essential to help users navigate your store. This tutorial outlines the steps to add categories to your site.

To add a product category:

Log in to the admin panel
Select Catalog->Manage Catetories from the top menu
In
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the left sidebar, first select “Default Category” then click “Add Subcategory.” (For your

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new category to show up in the frontend it must be a child to the “Default Category”)
Configure the category. At the minimum, you must give your category a Name and select “yes” in the “Is Active” dropdown.
Click the “Save Category” button to activate the category

Now go to the home page for your site and you will see your category added to the menu. Now you are ready to organize your products!

Better Thumbnails

brady — Tue, 27 Apr 2010 23:24:22 +0000

Today a client noticed that his thumbnails were fuzzy/pixelated. Turns out, he uploaded all his product images as GIF's (a terrible idea). GIF's don't scale very well at all… any resizing and they quickly lose their quality.

To fix this, I made resize() automatically convert GIF thumbnails to PNG, and the thumbnails looked much better:

The code

<br />

class MLogix_Myextension_Model_Image extends Mage_Catalog_Model_Product_Image<br />

{<br />

    public function resize()<br />

    {<br />

        if (is_null($this-&gt;getWidth()) &amp;&amp; is_null($this-&gt;getHeight())) {<br />

            return $this;<br />

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<p>        if(preg_match(&quot;/\.gif$/i&quot;,  $this-&gt;_baseFile) )<br />

        {<br />

        	$this-&gt;_keepTransparency = false;</p>

<p>        	$image = imagecreatefromgif($this-&gt;_baseFile);<br />

        	$newName = preg_replace(&quot;/\.gif$/i&quot;, &quot;.png&quot;, $this-&gt;_baseFile);<br />

        	imagepng($image, $newName);        	</p>

<p>        	$this-&gt;_baseFile = $newName;<br />

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    }</p>

<p>        return parent::resize();<br />

    }<br />

}<br />

Background color

Since we're already messing with the Product_Image model, here's another tip for you. In this same model you can change the automatic background color from white to any color you want.

<br />

class MLogix_Admintheme_Model_Image extends Mage_Catalog_Model_Product_Image<br />

{<br />

    protected $_backgroundColor  = array(42, 42, 42);<br />

}<br />

CodeIgniter queries in Magento

brady — Fri, 16 Apr 2010 19:39:45 +0000

CodeIgniter and Magento are both amazing development platforms. If you use both often you may want to reuse/share code across the two systems. This is a quick technique that might help you to do that.

The problem

The “Magento way” of database calls is very object oriented. This is a very effective model implementation, but isn't very compatible with CodeIgniter.

<br />

$model-&gt;load($id);<br />

$model-&gt;setTitle($title);<br />

$model-&gt;save();<br />

The solution

Fortunately, the CI ActiveRecord class and Zend Framework methods are very similar. Their methods generally behave in the same way. The following class simply maps the CI functions to each of their Zend counterparts, with some minor changes so the functions behave as a CI user would expect them to.

<br />

class CI_Zend_Adapter_Query<br />

{<br />

	var $result;<br />

	var $num_rows;<br />

	var $result_array;</p>

<p>	function __construct($result) {<br />

		$this-&gt;result = $result;</p>

<p>		$this-&gt;result_array = $result-&gt;fetchAll();<br />

		$this-&gt;num_rows = count($this-&gt;result_array());<br />

	}</p>

<p>	public function row_array()	{<br />

		if($this-&gt;num_rows)<br />

		  return $this-&gt;result_array[0];<br />

		else<br />

		  return 0;<br />

	}</p>

<p>	public function result_array() {<br />

		return $this-&gt;result_array;<br />

	}</p>

<p>	public function num_rows() {<br />

		return $this-&gt;num_rows;<br />

	}<br />

}</p>

<p>class CI_Zend_Adapter_DB<br />

{<br />

	var $write;</p>

<p>	function __construct()<br />

	{<br />

		$this-&gt;write = Mage::getSingleton(&amp;#039;core/resource&amp;#039;)-&gt;getConnection(&amp;#039;core_write&amp;#039;);<br />

	}</p>

<p>       /**<br />

        * Perform a raw query with Query Bindings<br />

	*/<br />

	public function query($sql, $arr = array())<br />

	{<br />

		$result = $this-&gt;write-&gt;query($sql, $arr);<br />

		$query = new CI_Zend_Adapter_Query($result);<br />

		return $query;<br />

	}</p>

<p>       /**<br />

        * CodeIgniter ActiveRecord style queries<br />

        */<br />

	public function update($table, $data, $where = array())<br />

	{<br />

		$this-&gt;write-&gt;update($table, $data, $where);<br />

	}</p>

<p>	public function delete($table, $where = array())<br />

	{<br />

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<p>		foreach($where as $key=&gt;$value)<br />

		{<br />

			$zendwhere[] = &quot;$key = $value&quot;;<br />

		}</p>

<p>		$this-&gt;write-&gt;delete($table, $zendwhere);<br />

	}</p>

<p>	public function insert($table, $data) {<br />

		$stmt = $this-&gt;write-&gt;insert($table, $data);<br />

	}</p>

<p>	public function insert_id()	{<br />

		return $this-&gt;write-&gt;lastInsertId();<br />

	}<br />

}<br />

How to use it

Place that class in a model somewhere, and then you can do this:

<br />

class Your_Extension_Model_Something extends Mage_Core_Model_Abstract<br />

{<br />

    public function _construct()<br />

    {<br />

        parent::_construct();<br />

        $this-&gt;db = new CI_Zend_Adapter_DB();<br />

...<br />

    }</p>

<p>    public function someMethod()<br />

    {<br />

        // Database calls<br />

        // The CodeIgniter way<br />

        $id = 17;<br />

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        $this-&gt;db-&gt;insert($data);</p>

<p>        $sql = &quot;select * from something where id = ?&quot;;<br />

        $query = $this-&gt;db-&gt;query($sql, array($id));<br />

    }<br />

}<br />

If you use CodeIgniter a lot, that should look very familiar to you. The class I included above certainly doesn't include all the functionality that CI offers, but it does offer the basics. In most cases, it's very easy to add the functionality that you need by modifying the classes above.

When to use it

You should only do it this way when portability between CI and Zend is the primary concern. The Magento Way has many uses and advantages, and should be used when possible.

But many times you just need and want basic CI query functionality without rewriting all of your code. This technique helps you do that.

Other ideas

This technique can be further implemented into Magento by creating a module that extends the core Model or Varien_Object classes. In this way all magento models would have access to CI-style queries. It's just a personal preference, but I definitely prefer CI queries over Zend Framework queries. I might just do that.

Magento Code Snippets

Hassan Bawab — Fri, 16 Apr 2010 19:36:48 +0000

Get the current theme folder

$this-&gt;getSkinUrl('') ?&gt;

How to tell id a user is logged in.

if(Mage::getSingleton( 'customer/session' )-&gt;isLoggedIn()) { echo ‘do something here’; }

Get database connection information

<br />

$config = Mage::getConfig()-&gt;getResourceConnectionConfig(&quot;default_setup&quot;);<br />

$dbServer = $config-&gt;host;<br />

$dbUser = $config-&gt;username;<br />

$dbPass = $config-&gt;password;<br />

Format currency
This will be formatted as $19.95, depending on your settings.

<br />

$amount = 19.95;<br />

$amount_formatted = Mage::app()-&gt;getStore()-&gt;getBaseCurrency()-&gt;format($amount, array(), true);

Get total of items in cart

echo $this-&gt;helper('checkout')-&gt;formatPrice(Mage::getSingleton('checkout/cart')-&gt;getQuote()-&gt;getGrandTotal())

Get product image

&lt;?php echo $this-&gt;helper('catalog/image')-&gt;init($_product, 'image'); ?&gt;

MySQL commands to clear all orders in the system. As always, be sure your databases are backed up before running this.

SET FOREIGN_KEY_CHECKS=0;</p>

<p>TRUNCATE `sales_order`;<br />

TRUNCATE `sales_order_datetime`;<br />

TRUNCATE `sales_order_decimal`;<br />

TRUNCATE `sales_order_entity`;<br />

TRUNCATE `sales_order_entity_datetime`;<br />

TRUNCATE `sales_order_entity_decimal`;<br />

TRUNCATE `sales_order_entity_int`;<br />

TRUNCATE `sales_order_entity_text`;<br />

TRUNCATE `sales_order_entity_varchar`;<br />

TRUNCATE `sales_order_int`;<br />

TRUNCATE `sales_order_text`;<br />

TRUNCATE `sales_order_varchar`;<br />

TRUNCATE `sales_flat_quote`;<br />

TRUNCATE `sales_flat_quote_address`;<br />

TRUNCATE `sales_flat_quote_address_item`;<br />

TRUNCATE `sales_flat_quote_item`;<br />

TRUNCATE `sales_flat_quote_item_option`;<br />

TRUNCATE `sales_flat_order_item`;<br />

TRUNCATE `sendfriend_log`;<br />

TRUNCATE `tag`;<br />

TRUNCATE `tag_relation`;<br />

TRUNCATE `tag_summary`;<br />

TRUNCATE `wishlist`;<br />

TRUNCATE `log_quote`;<br />

TRUNCATE `report_event`;</p>

<p>ALTER TABLE `sales_order` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_datetime` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_decimal` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_entity` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_entity_datetime` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_entity_decimal` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_entity_int` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_entity_text` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_entity_varchar` AUTO_INCREMENT=1;<br />

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ALTER TABLE `sales_order_text` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_order_varchar` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_flat_quote` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_flat_quote_address` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_flat_quote_address_item` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_flat_quote_item` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_flat_quote_item_option` AUTO_INCREMENT=1;<br />

ALTER TABLE `sales_flat_order_item` AUTO_INCREMENT=1;<br />

ALTER TABLE `sendfriend_log` AUTO_INCREMENT=1;<br />

ALTER TABLE `tag` AUTO_INCREMENT=1;<br />

ALTER TABLE `tag_relation` AUTO_INCREMENT=1;<br />

ALTER TABLE `tag_summary` AUTO_INCREMENT=1;<br />

ALTER TABLE `wishlist` AUTO_INCREMENT=1;<br />

ALTER TABLE `log_quote` AUTO_INCREMENT=1;<br />

ALTER TABLE `report_event` AUTO_INCREMENT=1;</p>

<p>-- reset customers<br />

TRUNCATE `customer_address_entity`;<br />

TRUNCATE `customer_address_entity_datetime`;<br />

TRUNCATE `customer_address_entity_decimal`;<br />

TRUNCATE `customer_address_entity_int`;<br />

TRUNCATE `customer_address_entity_text`;<br />

TRUNCATE `customer_address_entity_varchar`;<br />

TRUNCATE `customer_entity`;<br />

TRUNCATE `customer_entity_datetime`;<br />

TRUNCATE `customer_entity_decimal`;<br />

TRUNCATE `customer_entity_int`;<br />

TRUNCATE `customer_entity_text`;<br />

TRUNCATE `customer_entity_varchar`;<br />

TRUNCATE `log_customer`;<br />

TRUNCATE `log_visitor`;<br />

TRUNCATE `log_visitor_info`;</p>

<p>ALTER TABLE `customer_address_entity` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_address_entity_datetime` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_address_entity_decimal` AUTO_INCREMENT=1;<br />

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 TABLE `customer_address_entity_int` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_address_entity_text` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_address_entity_varchar` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_entity` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_entity_datetime` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_entity_decimal` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_entity_int` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_entity_text` AUTO_INCREMENT=1;<br />

ALTER TABLE `customer_entity_varchar` AUTO_INCREMENT=1;<br />

ALTER TABLE `log_customer` AUTO_INCREMENT=1;<br />

ALTER TABLE `log_visitor` AUTO_INCREMENT=1;<br />

ALTER TABLE `log_visitor_info` AUTO_INCREMENT=1;</p>

<p>-- Reset all ID counters<br />

TRUNCATE `eav_entity_store`;<br />

ALTER TABLE  `eav_entity_store` AUTO_INCREMENT=1;</p>

<p>SET FOREIGN_KEY_CHECKS=1;