Magento – How Are Magento Lib Files Loaded

classextensionsmodel

On a mage site using sagepay, inside the Sagepaysuite model there is a call to a class

file: Ebizmarts/SagePaySuite/Model/Api/Payment.php

   $xml = new Ebizmarts_Simplexml_Element('<customer />');

The class 'Ebizmarts_Simplexml_Element' can be found in – root/lib/Ebizmarts/Simplexml/Element.php

   class Ebizmarts_Simplexml_Element extends Varien_Simplexml_Element

I can see from checking apache logs that this cannot be found

   Class 'Ebizmarts_Simplexml_Element' not found in <path to payment.php

I assume an include of this file before the class is called would work but this cannot be best practice and may not be enough if the class is required in other areas of the extension that I have not yet noticed. How exactly are lib files loaded in Magento and any ideas why it is not getting it in this case.

Best Answer

Theoratical lib is part of the include_path and the autoloader searches for the file in the include_path. The question is, why does your installation not.

I would think you have turned on the compiler (DON'T DO THIS. REALLY!).

If this is not the case, maybe you have Aoe_ClassPathCache installed, or something similar?

Whatever you have installed, this should not happen and I'm sure, in a standard magento this doesn't happen.

Related Solutions

Magento 1 – Fix Class Not Found Error

For the Magento autoloader to find it, the class must be called NameSpace_MyClass, not MyClass and also not NameSpace\MyClass

If you want to use libraries with real namespaces, you need an additional autoloader that is PSR-0 or PSR-4 compatible. I can recommend the Magento-PSR-0-Autoloader

With this extension, you would register the namespace in config.xml like this:

<psr0_namespaces>
    <NameSpace />
</psr0_namespaces>

Then, define a real namespace:

namespace NameSpace;

class MyClass{

    private $id;

    public function __construct($id) {
        $this->id = $id;
    }
}

And use to the class like this:

use NameSpace\MyClass;
$class = new MyClass($id);

Magento 1.4 Extensions – How to Extend a Core Helper vs. Copying to Local

You can extend the class, the missing piece of the puzzle is to add an entry into your etc/config.xml

<config>
    ...
    <global>
        ...
        <helpers>
            <catalog>
                <rewrite>
                    <category>Mycompany_Catalog_Helper_Category</category>
                </rewrite>
            </catalog>
        </helpers>
        ...
    </global>
   ...
</config>

This will tell Magento to override the catalog/category helper, so the call Mage::helper('catalog/category') will return your class.

Best Answer

Related Solutions

Magento 1 – Fix Class Not Found Error

Magento 1.4 Extensions – How to Extend a Core Helper vs. Copying to Local

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