这段代码可以获取到各种路径，他帮助我解决了很多路径上的问题-This code is able to access to all kinds of path, he help me to solve a lot of problems on the path

使用PHP代码实现的二分查找算法，已经封装成方法，并有一个使用示例-Binary search algorithm implemented using PHP code has been encapsulated into methods, and there is a usage example