PHP recursive delete files and directory functions _php tutorial

Delete files and directories in PHP rmdir () function can be done, but to delete a non-empty directory, will not be able to quickly delete, you must first delete the directory files, but there may be subdirectories in the directory, so you want to do PHP recursive delete directory

Recursive functions are self-calling functions, in the body of the function directly or indirectly call themselves, but need to set the self-invocation of the condition, if the condition is satisfied, then call the function itself, if not satisfied then terminate the function of the self-invocation, and then the current process of the main control back to the previous layer function to execute.

Let's take a look at a classic recursive delete function

Function: Delete all files under the directory and delete the directory

Function code:

The code is as follows

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function Deldir ($dirname) { if (file_exists ($dirname)) {//first determine if the directory is valid $dir = Opendir ($dirname);//Open Directory with Opendir while ($filename = Readdir ($dir)) {//Use Readdir loop to read contents of directory if ($filename! = "." && $filename! = "...") {//exclude '. ' and ".." These two special directories $file = $dirname. " /". $filename; if (Is_dir ($file)) {//determines if it is a directory, and if yes it calls itself Deldir ($file); Using recursion to delete subdirectories }else{ @unlink ($file);//delete files } } } Closedir ($dir);//close file operation handle RmDir ($dirname);//delete directory } } ?> Use instance: Public is a folder with many folders and files, call Deldir ($dirname) to delete it $dir = ' public ';//pass in a folder path Deldir ($dir);//Call function ?>

Note: First determine if public exists, if it is open public, then use Readdir loop to read the contents of the public directory, if there is "." and ".." These two special directories are excluded. If a folder is encountered, it calls itself processing until the condition is not satisfied. The files are deleted directly when they are encountered. The last layer jumps out of the delete public.

Instance two, deleting a non-empty directory

The code is as follows

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/* Custom Delete functions that can delete files and recursively delete folders */ function My_del ($path) { if (Is_dir ($path)) { $file _list= Scandir ($path); foreach ($file _list as $file) { if ($file! = '. ' && $file! = ' ... ') { My_del ($path. ' /'. $file); } } @rmdir ($path); This method does not have to tell if the folder is empty, because the folder is empty at the beginning, when it arrives here, it is empty. } Else { @unlink ($path); These two places best still have to use @ Shielding warning error, watching the frustration } } $path = ' d:/Technical document-copy '; The folder to delete If the PHP file is not ANSI, but UTF-8 mode, and the folder you want to delete contains Chinese characters, you need to transcode the function before calling it $path =iconv (' utf-8 ', ' gb2312 ', $path); My_del ($path);

Example 3 to see why the failure was successful

code as follows

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<? PHP Functiondeletedir ($dir) { if (!handle= @opendir ($dir)) {//detects if there is a die ("no directory") to open the directory; } while (false!== ($file =readdir ($handle))) { if ($file!== ".") && $file!== "..") {//excludes the current directory from the parent directory $file = $dir. Directory_separator. $file; if (Is_dir ($file)) { Deletedir ($file); }else{ if (@unlink ($file)) { echo ' file $file Delete succeeded. "; }else{ echo "file $file Delete failed!" "; } } } if (@rmdir ($dir)) { echo ' directory $dir Delete succeeded. N "; }else{ Echo "directory $dir Delete failed! N "; } } //test program $dir = "/var/www/test"; Deletedir ($dir); ? >

Create a Write folder and file test under the/var/www/test folder
Shell>touchaaa
shell>touchbbb
Shell>touchccc
Shell>toucheee
Shell>touchffff
shell>mkdir111
shell>mkdir222
shell>mkdir333
Write files in the 111,222,333 folder, respectively. There's not much to say, and then give them permission.
Shell>chown[url]www.www[/url]test-r

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