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                ### 8.3.3 動態用法 前面介紹的這些命名空間的使用都是名稱為CONST類型的情況,所有的處理都是在編譯環節完成的,PHP是動態語言,能否動態使用命名空間呢?舉個例子: ```php $class_name = "\aa\bb\my_class"; $obj = new $class_name; ``` 如果類似這樣的用法只能只用完全限定名稱,也就是按照實際存儲的名稱使用,無法進行自動名稱補全。
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