templates - 为什么 Magento 中的局部变量有一个下划线前缀？

Question

作为后续 an earlier question我想知道是否有人知道为什么 Magento 模板都用下划线声明它们的变量。模板是 .phtml 文件 include -ed 来自 Mage_Core_Block_Template::fetchView() ，它们的局部变量在函数结束时被处理掉，永远不会变成全局变量。

那么下划线有什么意义呢？

Answer 1

我认为是尊重采埃孚的命名约定:

http://framework.zend.com/manual/en/coding-standard.naming-conventions.html#coding-standard.naming-conventions.variables

For instance variables that are declared with the "private" or "protected" modifier, the first character of the variable name must be a single underscore. This is the only acceptable application of an underscore in a variable name. Member variables declared "public" should never start with an underscore.