PHP Recursive implementation of infinite-level classification of the development process and sample code

In some complex systems, it is required to classify the information columns infinitely, in order to enhance the flexibility of the system. Recursive, Simple is a program code repeated calls, when the code is written into a custom function, the parameters and other variables are saved, function repeatedly called functions, until a certain condition to jump out, return the corresponding data. So how does PHP implement an infinite class classification?

First step: Download the PHP recursive implementation of the infinite class library that we need to use for this lesson: http://www.php.cn/xiazai/leiku/292

The second step: After the download is complete, find the PHP class file, unzip to the local server, create a new PHP file!

Step Three: We call this class in this new file, and instantiate this class:

<?phpinclude_once "cate.php";//Introduce class file $obj = new category;   Instantiate $obj->unlimitedforlayer ($cate); Var_dump ($obj->unlimitedforlayer ($cate));//var_dump ($obj Unlimitedforlevel ($cate));//var_dump ($obj->getparents ($cate, 7));//var_dump ($obj->getchildsid ($cate, 2)); /var_dump ($obj->getchilds ($cate, 2));?>

The results of the operation are as follows: