How can the following be accomplished in Magento?

- Display a &quot;Hello World&quot; message using a controller/view/model approach. So, if I went to `http://example.com/myController` it would show the string &#39;Hello World&#39;. Being able to show this string within the template of my website (for example, the header, footer, etc.) will be a bonus.

- How do I add a method to this controller (or a new controller if necessary), which interacts with a model, and performs the query `Select * FROM articles where id=&#39;10&#39;` and returns the row (containing the columns `id, title, content`) to the controller? And then use the controller to include a view, which would display this row. So going to `http://example.com/myController/show_row` (or something similar) would display the row within a view. (No need to be fancy, just a `echo $row-&gt;id;` or something similar would work.)

Any other information about Magento&#39;s code structure will also be very helpful.


How do I create a simple &#39;Hello World&#39; module in Magento?

I&#39;ve found an error on a page in my Magento application; it always show this message error when I visit it:

&gt; Fatal error: Class &#39;DOMDocument&#39; not found in /home/.../lib/Zend/Feed/Abstract.php on line 95

Can you give me a solution? I&#39;m using magento 1.4.1.1.


Class &#39;DOMDocument&#39; not found

Is Magento usually so terribly slow?

This is my first experience with it and the admin panel simply takes ages to load and save changes. It is a default installation with the test data.

The server where it is hosted serves other non-Magento sites super fast.  What is it about the PHP code that Magento uses that makes it so slow, and what can be done to fix it?

Why is Magento so slow?

What is the difference between &quot;Flush Magento Cache&quot; and &quot;Flush Cache Storage&quot; in magento&#39;s cache management?

![enter image description here][1]


  [1]: http://i.stack.imgur.com/UHmHJ.png

What is the difference between &quot;Flush Magento Cache&quot; and &quot;Flush Cache Storage&quot; in magento&#39;s cache management?

My application was working fine yesterday. I started my PC today. When I tried to start Magento I got this error message.

&gt; Service Temporarily Unavailable
&gt;
&gt; The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

I am not even able to open the admin page or see any sort of errors on the page. If I visit any URL of my Magento site I am getting the above output. How do I resolve this?

Service Temporarily Unavailable Magento?

I just want to understand the meaning of

     &lt;block type=&quot;page/html&quot; name=&quot;root&quot; output=&quot;toHtml&quot; template=&quot;example/view.phtml&quot;&gt;

I got many references from Google and understood many things about it but I am still unable to understand the formation of `type=&quot;page/html&quot;` how to form a type for my custom module. 

Please explain

    type=&quot;A/B&quot;

Let me know where this A and B come from?



Understanding Magento Block and Block Type

How to get specific product attribute value if i know product ID without loading whole product?

Magento Product Attribute Get Value

In my block code I am trying to programmatically retrieve a list of products that have a attribute with a specific value.

Alternately if that is not possible how would one retrieve all products then filter them to just list the products with a specific attribute?

How would I perform a search using standard boolean filters `AND` or `OR` to match a subset of my products?

Magento - Retrieve products with a specific attribute value

I&#39;ve recently been tasked with the build and deployment of a large Ecommerce site. In the past we&#39;ve had to use the clients legacy X-cart installation for redevelopment (too far integrated with their existing work flow).

We&#39;d heard good things about Magento, so I&#39;ve set up a test install to get to grips with it. After a couple of initial issues, there is a live development site which displays categories on the default theme. The problem we&#39;ve hit now is that products don&#39;t display..!

After a lot more in-depth research into this, all I&#39;ve been able to discover is that quite a number of developers endorse using other solutions entirely, with the other 50% saying after the steep learning curve the platform is as wonderful as we&#39;d initially been led to believe.

Now, my test category is showing, so I know this is configured properly. I&#39;ve set up three test products and associated them with this (all done following the Magento user guide), checked double checked and thrice checked the products are enabled and visible individually, yet still the front end says the category has no products in it. I&#39;ve cleared the cache repeatedly, reset everything possible many times in index management - no products show up.

I have to make a call tomorrow morning on whether we&#39;re going ahead with Magento. If I can&#39;t even get it to show products I&#39;m going to have to go with something with a more established track record and more community support available. Can anybody advise what could possibly be wrong here?

Magento products will not show in category

In Magento, how can I get active store information, like store name, line number, etc?

How to get store information in Magento?

I am working on implementing a new payment module for Magento and want to understand the core concept behind this logic. I know I have to extend from Mage_Payment_Model_Method_Abstract or any of its children classes, but my problem is when to use and how to use capture and authorize methods in my model.
For example if I split the whole process in steps like this:&lt;br/&gt;   

1. User comes to the shopping cart and choses lets say some payment method which is gateway. 
2. The system intercepts the request, collects all submitted data and sends the user to the gateway url.
3. User places his order (or cancels) at the gateway site which sends information about it to my store.  
4. My store does some more modifications to the order with the received data and saves the order with status completed or canceled.

Where in these steps will I have to use authorize and capture methods ? I would appreciate if someone could explain to me what authorize and capture means?

Magento Payment flow

I have a question regarding clearing of the log data in Magento.

I have more than 2.3GB of data in Magento 1.4.1, and now I want to optimize the database, because it&#39;s too slow due to the size of the data. I checked the log info (URL,Visitors) and it shows more than 1.9 GB. If I directly clear those records, will it affect any functionality in the site? How can I clear the log details? By clearing those data will I have or lose any data on my site?

Clearing Magento Log Data

**Summary**

I want to create a product attribute that is not saved to products, or displayed on the product edit page like ordinary product attributes. Instead I want it to be saved to order/quote items and displayed on orders, invoices and such. It should also be configurable by the customer in the frontend before adding a product to the cart.

**Details**

* Just like with *Custom Options*, a form element should be added to the frontend product page.
  * **Unlike** Custom Options, this is not an *actual* product attribute. It should not be displayed on the admin product pages or attribute sets.
  * The customer is required to provide a valid value. I need to be able to do server-side validation.
  * I want to have a .phtml template generating its html. Currently I&#39;m able to override *app/design/frontend/base/default/catalog/product/view/type/default.phtml* with satisfactory (design) results. However I don&#39;t know how to capture, validate and eventually save its value.
* The value of this form element should be saved with the quote/order product item.
  * This value should be displayed on any and all invoices, orders, sales emails.
  * I want to control output with a template, or at least be able to return the string that is used to display the value

**My questions**

1. How do I validate and eventually save the value from a `&lt;input&gt;` on the frontend product page to the quote item when the product is added to the cart, and later in the checkout process to the order item?
2. How do I display this value on the order, invoice, sales emails and such pages?
3. How do I filter an order collection to fetch orders that has items with my value set to a specific value?

**Update 1**

I&#39;ve discovered that I can run this code on a `catalog/product` model (and probably `sales/quote_item` as well) during events such as `sales_quote_item_qty_set_after`

    $infoBuyRequest = $product-&gt;getCustomOption(&#39;info_buyRequest&#39;);
    $buyRequest = new Varien_Object(unserialize($infoBuyRequest-&gt;getValue()));
    $myData = $buyRequest-&gt;getMyData();

In this way I was able to retrieve my custom, customer supplied, data from my `&lt;input&gt;` on the product page.

I suspect this `info_buyRequest` is saved with the quote and order items. If so, this *partially* solved my problems 1 and 2. However, I still dont know where it&#39;s suitable to run this code, and I dont know how to display it on the backend order/quote/report pages. Also I belive since this is stored as a serialized value in the database, it will be most difficult to get quote/order item collections based on my custom data.

Magento - Quote/order product item attribute based on user input

I&#39;m experiencing painfully slow operations with one of our SVN repositories/projects.

For example, it&#39;s taking 5-10 minutes to revert the changes in one small file (10&amp;nbsp;KB). Or about 40-60 minutes to check out the project of 100&amp;nbsp;MB.

There are about 30 other projects on the same server, some vastly bigger than this one, and none of them preform like this.

One thing to note is that this project is a [Magento][1] project. It&#39;s not very large in terms of disk space, but I have 23k Files and 11k folders, and I have read SVN preforms badly when there are lots of little files; is this true? And is there anything I can do to speed things up?

  [1]: http://www.magentocommerce.com/



SVN/TortoiseSVN painfully slow

From the following line in 2columns-right.phtml

&lt;!-- language: lang-html --&gt;

    &lt;div class=&quot;col-main&quot;&gt;
        &lt;?php echo $this-&gt;getChildHtml(&#39;global_messages&#39;) ?&gt;
        &lt;?php echo $this-&gt;getChildHtml(&#39;content&#39;) ?&gt;
    &lt;/div&gt;

I am not able to understand where the `content` in `&lt;?php echo $this-&gt;getChildHtml(&#39;content&#39;) ?&gt;` is coming from.

Which .phtml file is called to display the data by `&lt;?php echo $this-&gt;getChildHtml(&#39;content&#39;) ?&gt;`?

Understanding getChildHtml in Magento

I just transfered my magento installation from one local machine server to another. Now, I cannot login to admin panel. When I go to the admin login url, I get the following error message:-

 **&quot;Error: 404 Not Found&quot;**

Some of my module&#39;s pages also show this error.

Can anyone please figure out the problem?

&quot;Error 404 Not Found&quot; in Magento Admin Login Page

I&#39;m working on the display of the stock availability on the (individual) product page of my Magento theme, and there&#39;s something I don&#39;t completely understand about this.

I see two methods being used in the templates to check whether a product is available for sale:
```php
    Mage_Catalog_Model_Product::isAvailable()
    Mage_Catalog_Model_Product::isSaleable()
```
**My own findings:**  
I see that `isSalable()` (which in turn is called by `isSaleable()`) calls `isAvailable()` but also dispatches two events (`catalog_product_is_salable_before` and `catalog_product_is_salable_after`).

On the frontend, I&#39;ve noticed that in Magento&#39;s base template `isAvailable()` is used to decide whether to display the product as &quot;in stock&quot; or &quot;out of stock&quot;; `isSaleable()` is used to decide something like whether to show an &quot;Add to Cart&quot; button.

On the backend, I&#39;ve noticed that when the stock quantity becomes zero and backorders are *not* allowed, the stock availability of a product goes to &quot;out of stock&quot;.
When the stock quantity becomes zero and backorders *are* allowed, the stock availability of the product remains unchanged.

**Question:**  
The properties &quot;stock availability&quot; and &quot;stock quantity&quot; are obviously linked with each other and the mentioned PHP methods. I would like to know: 

 - what the *semantic* difference between the PHP methods `isAvailable()` and
   `isSaleable()` is and why I would use one over the other;

 - what it is I appear not yet to know about their relation with these properties and Magento&#39;s behavior.

Thank you.

**EDIT:**  
I&#39;ve tried every relevant combination of stock quantity (-1,0,1), stock availability (in/out of), and backorders (on/off) for a product and this is the result:

&lt;pre&gt;
St.Qu  BckOrd  St.Av  isSalable()  isSaleable()  isAvailable()
   -1       0      0            0             0              0
   -1       0      1          N/A           N/A            N/A
   -1       1      0            0             0              0
   -1       1      1            1             1              1
    0       0      0            0             0              0
    0       0      1          N/A           N/A            N/A
    0       1      0            0             0              0
    0       1      1            1             1              1
    1       0      0            0             0              0
    1       0      1            1             1              1
    1       1      0            0             0              0
    1       1      1            1             1              1
&lt;/pre&gt;

Just for the sake of completeness:  
```php
St.Av 0  = out of stock
St.Av 1  = in stock
BckOrd 0 = no backorders allowed
BckOrd 1 = backorders are allowed

```
It is the stock availability switch in Magento that controls the return value of all of the PHP methods, but when backorders are off and stock quantity drops below 1, the stock availability will automatically be reset to &#39;out of stock&#39; (hence the `N/A` rows).

What is the difference between isSaleable() and isAvailable()?

I just wandering on how I can get the configuration data for my custom module. The configuration can be set from the admin `system-&gt;configuration` and how to pull it in frontend?

How to get data from Magento System Configuration

I want to add a product to cart programmatically. Also, I want to change the product price when added to cart. 

Suppose, my product&#39;s price is $100. I wanted to change it to $90 when added to cart.

I added product to cart. However, I am unable to change the product price.

Is it possible?

Here is the code to add product to cart:-

    $cart = Mage::getSingleton(&#39;checkout/cart&#39;);
    
    try {	
    	$cart-&gt;addProduct($product, array(&#39;qty&#39; =&gt; 1));
    	$cart-&gt;save();
    }
    catch (Exception $ex) {
    	echo $ex-&gt;getMessage();
    }

Programmatically add product to cart with price change

I need to enable gzip compression on nginx server. As I have  observed from firfox firebug NET tools, I have found that html file are gzip compressed. But Not the javascript files and CSS files. 

I have already check **Mime.types** and nginx configuration file **/etc/nginx/ngnix.conf** and not found any issue.
still not able to see the css and javascript Gzip Compression.
My NGINX.conf entries are as below

    gzip on;
    gzip_disable &quot;msie6&quot;;

    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;
    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

Enable GZIP for CSS and JS files on NGINX server for Magento

In Magento CE, I&#39;d like to install an add-on to Extendware Page Cache called Lightening Cache.

It requires editing the Apache configuration inside the virtual host definition for the site, by adding:

    RewriteEngine On
    RewriteMap ewpchash prg:/home/.../shell/extendware/ewpagecache/apache/md5.php
    
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{REQUEST_URI} !\.(js|css|png|jpg|jpeg|ico|gif)$ [NC]
    RewriteCond %{DOCUMENT_ROOT}%{SCRIPT_FILENAME} !-f
    RewriteCond ${ewpchash:%{HTTPS};~;%{HTTP_HOST};~;%{REQUEST_URI};~;%{QUERY_STRING};~;%{HTTP:Cookie};~;%{SCRIPT_FILENAME};~;%{REMOTE_ADDR};~;%{HTTP_USER_AGENT}} -f
    RewriteRule ^(.*)$ ${ewpchash:%{HTTPS};~;%{HTTP_HOST};~;%{REQUEST_URI};~;%{QUERY_STRING};~;%{HTTP:Cookie};~;%{SCRIPT_FILENAME};~;%{REMOTE_ADDR};~;%{HTTP_USER_AGENT}} [NC,L]
    &lt;FilesMatch &quot;\.(html)$&quot;&gt;
         Header unset Cache-Control
         Header unset Expires
         Header append Expires &quot;Thu, 19 Nov 1981 08:52:00 GMT&quot;
         Header append Cache-Control &quot;must-revalidate&quot;
    &lt;/FilesMatch&gt;

I have added this to the bottom of `/etc/apache2/sites-enabled/site.conf`.

When I run the command `apachectl graceful`, I receive the error:

&gt; AH00526: Syntax error on line 53 of
&gt; /etc/apache2/sites-enabled/site.conf: Invalid command &#39;Header&#39;,
&gt; perhaps misspelled or defined by a module not included in the server
&gt; configuration Action &#39;graceful&#39; failed. The Apache error log may have
&gt; more information.

Site is running Apache 2.4

Have I done something wrong?

Apache: edit to .conf file produces &quot;Invalid command &#39;Header&#39;&quot;

I&#39;m customizing the product view page and I need to show the user&#39;s name.
How do I access the account information of the current user (if he&#39;s logged in) to get Name etc. ?

Current user in Magento?

I am new to Magento. I can&#39;t find log files in Magento. I googled it, but the [Magento Commerce][1] site returns closed and some other sites explain how to create custom log files. I want to know the location of built-in log files.

  [1]: http://www.magentocommerce.com/

Where are Magento&#39;s log files located?

[Jonathon Day](https://stackoverflow.com/users/336905/jonathan-day) says

&gt; &quot;updates SHOULD NOT be in the form of
&gt; SQL commands&quot;. I haven&#39;t come across
&gt; any DDL or DML statments that cannot
&gt; be executed via Magento&#39;s config
&gt; structures.

(In the question [How can I migrate configuration changes from development to production environment?](https://stackoverflow.com/q/4208030/471559))

I would like to know how best to add/modify/remove a column or index to/from a table in this manner, but without relying on SQL? Is it even possible?

Furthermore, what other actions can only be done in SQL?

ALTER TABLE in Magento setup script without using SQL

I&#39;m attempting to track down the cause of a rare bug (love those intermittent bugs) where a customer selects to Register at time of checkout, but when the order is completed, Magento somehow fails to save the customer record.  This results in an orphan order with no email address, a difficult customer service situation.  

Here are the results of my investigations so far: 

 - The Sales Order View in adminhtml reports that the customer is a Guest and the email address is blank.  Billing and Shipping addresses are visible.
 - `customer_is_guest` is false in `sales_flat_order`
 - The `sales_flat_order` entry links to a valid record in `sales_flat_order_address`. 
 - The `sales_flat_order_address` record contains values for `customer_id` and `customer_address_id` however those linked records do not exist.
 - There is no discernible pattern in customer information, products ordered, payment methods.
 - There are no relevant entries in system.log, exception.log, apache error logs, var/reports or any other logs that I&#39;m aware of.

Thoughts:   

 - the customer save is progressing far enough that an ID is generated. 
 - there is an observer on customer_save_after that is causing a rollback of the save?
 - a low-level database error is causing the save to fail.

Does anyone have any suggestions on how to track this down?

Version is Enterprise 1.9.

All Magento Solutions on Gang of Coders

Total of 25 Magento Solutions

How do I create a simple 'Hello World' module in Magento?

Class 'DOMDocument' not found