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我想从文件中的特定函数中获取实际的编程代码文本。例如，我想在__construct(){}调用Examplein的类中获取代码ExampleClass.php。我怎样才能做到这一点？
__construct(){}
Example
ExampleClass.php
正则表达式是最好的方法还是有更好的方法？