这也需要一种查询语言来提供可动态创建复杂嵌套结构的构造函数，而该工具在关系语言中是不需要的。

It also requires a query language to provide constructors that are capable of creating complex nested structures on the fly — a facility that is not needed in a relational language.

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net提供了一个在线的可搜索函数库，它对于查找有关PHP方法的详细信息和学习语言构造有很大的帮助。

PHP.net offers an online searchable function library that is a great aid to finding detailed information on PHP methods and to hunting down builds of the language.

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Unity是一个轻量级，可扩展的依赖注入容器，支持构造函数，属性和方法调用注入。

Unity is a lightweight, extensible dependency injection container with support for constructor, property, and method call injection.

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