我遇到了一个问题，我不知道如何解决它。我对 Magento 和 PHP 很陌生，所以对错误了解不多，我通常用谷歌搜索它来修复它，但似乎找不到任何解决这个问题的东西。
我收到以下错误。升级到 1.6.2.0 后，Magento 使用了一个名为“modern”的主题，但是当我将其更改为原来的主题时，我得到了错误。我还附上了错误似乎源于错误的文件“list_sidebar.phtml”。
任何帮助将不胜感激。
There has been an error processing your request
Invalid method Mage_Catalog_Block_Product_List::myGetProductCollection(Array
(
[0] => 18
)
)
Trace:
#0 /home/lailides/devmagento/store/app/design/frontend/default/lailides/template/catalog/product/list_sidebar.phtml(47): Varien_Object->__call('myGetProductCol...', Array)
#1 /home/lailides/devmagento/store/app/design/frontend/default/lailides/template/catalog/product/list_sidebar.phtml(47): Mage_Catalog_Block_Product_List->myGetProductCollection('18')
#2 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Template.php(241): include('/home/lailides/...')
#3 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/defaul...')
#4 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#5 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Abstract.php(863): Mage_Core_Block_Template->_toHtml()
#6 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml()
#7 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Abstract.php(863): Mage_Core_Block_Text_List->_toHtml()
#8 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Abstract.php(582): Mage_Core_Block_Abstract->toHtml()
#9 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Abstract.php(526): Mage_Core_Block_Abstract->_getChildHtml('left', true)
#10 /home/lailides/devmagento/store/app/design/frontend/default/lailides/template/page/3columns.phtml(46): Mage_Core_Block_Abstract->getChildHtml('left')
#11 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Template.php(241): include('/home/lailides/...')
#12 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/defaul...')
#13 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#14 /home/lailides/devmagento/store/app/code/core/Mage/Core/Block/Abstract.php(863): Mage_Core_Block_Template->_toHtml()
#15 /home/lailides/devmagento/store/app/code/core/Mage/Core/Model/Layout.php(529): Mage_Core_Block_Abstract->toHtml()
#16 /home/lailides/devmagento/store/app/code/core/Mage/Core/Controller/Varien/Action.php(391): Mage_Core_Model_Layout->getOutput()
#17 /home/lailides/devmagento/store/app/code/core/Mage/Cms/Helper/Page.php(132): Mage_Core_Controller_Varien_Action->renderLayout()
#18 /home/lailides/devmagento/store/app/code/core/Mage/Cms/Helper/Page.php(52): Mage_Cms_Helper_Page->_renderPage(Object(Mage_Cms_IndexController), 'home')
#19 /home/lailides/devmagento/store/app/code/core/Mage/Cms/controllers/IndexController.php(45): Mage_Cms_Helper_Page->renderPage(Object(Mage_Cms_IndexController), 'home')
#20 /home/lailides/devmagento/store/app/code/core/Mage/Core/Controller/Varien/Action.php(420): Mage_Cms_IndexController->indexAction()
#21 /home/lailides/devmagento/store/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('index')
#22 /home/lailides/devmagento/store/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#23 /home/lailides/devmagento/store/app/code/core/Mage/Core/Model/App.php(349): Mage_Core_Controller_Varien_Front->dispatch()
#24 /home/lailides/devmagento/store/app/Mage.php(640): Mage_Core_Model_App->run(Array)
#25 /home/lailides/devmagento/store/index.php(80): Mage::run('', 'store')