Step by step to learn how to develop File System instances in PHP

Step by step to learn how to develop a file system instance in PHP-general Linux technology-Linux programming and kernel information. The following is a detailed description. PHP has many functions related to the file system. These functions can not only open files, but also display contents in directories, move files, and other functions, many people even use PHP to develop Internet-based file resource managers.
　　
The following script example shows a directory list with annotations included in the Code:
　　 $ Dir_name = "/home/me /";
/? Create a handle whose value is the result of opening a given directory? /
$ Dir = opendir ($ dir_name );
/? Create a text block to place the list element (File Name )? /
$ File_list =" /? Use a while statement to read all the elements in the opened directory. If the file name is not "." or "...", the name/
While ($ file_name = readdir ($ dir )){
If ($ file_name! = ".") & ($ File_name! = "..")){
$ File_list. =" }
}
$ File_list. ="/? Close the opened directory and end the PHP module? /
Closedir ($ dir );
?>