Magento - 覆盖块

问题描述：

I trying to do an example of overriding a block. I thought I followed the instructions correctly, but nothing happens. Is there an error somewhere?

The block to be overwritten is Mage_Page_Block_Html_Head. I do the rewrite of the block in config.xml:

<config>
   <blocks>
        <html>
            <rewrite>
                <head>Hello_Mymodule_Block_Head</head>
            </rewrite>
        </html>
    </blocks>    
 </config>

Then I create Head.php in: app - code - local - Hello - Mymodule - Block - Head.php.

I copy the getTitle method from the original Head.php into my new Head.php, then I just put in "die()" to see if it works:

class Hello_Mymodule_Block_Head extends Mage_Page_Block_Html_Head {
public function getTitle()
{
    die();
    if (empty($this->_data['title'])) {
        $this->_data['title'] = $this->getDefaultTitle();
    }
    return strtoupper(htmlspecialchars(html_entity_decode(trim($this->_data['title']), ENT_QUOTES, 'UTF-8')));
}}

Nothing happens, and I don't know how to search for the error. My module is active and working (it shows up in admin)

我试图做一个覆盖块的例子。我以为我正确地遵循了说明，但没有任何反应。某处有错误吗？ p>

要覆盖的块是 Mage_Page_Block_Html_Head strong>。我在config.xml中重写了块： p> \ n

 ＆lt; config＆gt; 
＆lt; blocks＆gt; 
＆lt; html＆gt; 
＆lt; rewrite＆gt; 
＆lt; head＆gt; Hello_Mymodule_Block_Head＆lt; / head＆gt; 
＆lt; / rewrite＆gt; \  n＆lt; / html＆gt; 
＆lt; / blocks＆gt;  
＆lt; / config＆gt; 
  code>  pre> 
 
 然后我创建了Head.php：app  -  code  -  local  -  Hello  -  Mymodule  -  Block  -  Head.php。  p> 
 
 
我将原始Head.php中的getTitle方法复制到我的新Head.php中，然后我只是输入“die（）”来查看它是否有效： p> 
 \  n 
 类Hello_Mymodule_Block_Head扩展Mage_Page_Block_Html_Head {
public function getTitle（）
 {
 die（）; 
 if（empty（$ this-＆gt; _data ['title']））{
 $  this-＆gt; _data ['title'] = $ this-＆gt; getDefaultTitle（）; 
} 
返回strtoupper（htmlspecialchars（html_entity_decode（trim（$ this-＆gt; _data ['title']），ENT_QUOTES，'  UTF-8'）））; 
}} 
  code>  pre> 
 
 没有任何反应，我不知道如何搜索错误。 我的模块处于活动状态并正常工作（它显示在管理员中） p> 
  div>

答

You have to rewrite block Mage_Page_Block_Html_Head but what you are trying to rewrite is Mage_Block_Html_Head which do not exist at all. change your confix xml to

<config>
   <blocks>
        <page>
            <rewrite>
                <html_head>Hello_Mymodule_Block_Head</html_head>
            </rewrite>
        </page>
    </blocks>    
 </config>

Magento - 覆盖块

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