Detailed explanation of directory operation examples in PHP

This article mainly shares with you a detailed explanation of directory operation examples in PHP, Mkdir (directory address [, permissions [, whether to create recursively (default is false)]]); returns true if successful, otherwise returns false. The default permission is 0777, which is the maximum access permission. This setting has no effect in Windows systems (Linux operation).

echo mkdir('./name/li');//当前目录下并没有name这个文件夹

When performing this operation, an error is reported because the folder name does not exist at all, so the li folder under the name folder cannot be created

echo mkdir('./name/li',0777,true);//支持递归创建。

At this time, the return result is 1, which means the execution is successful, and the name folder exists in the current directory, and there is also the li folder in its subfolder. This is the recursive creation supported by Mkdir() - that is, automatically creating folders that do not exist at the directory address.

Delete directory:

Rmdir (directory address); only empty directories can be deleted here, and recursive deletion is not supported.

Move (rename):

Rename(old address, new address);

rename('./name/li','./li'); After performing this operation on the above inheritance, the name folder exists in the current directory, and the li folder exists, but the li folder under the name folder disappears. (This function also supports operating files)

Get directory content:

1. Open the directory: directory handle = opendir (directory address);

2. Read the file: File name = readdir (directory handle); read one file (subdirectory) in sequence and move the handle pointer downward at the same time. If it cannot be obtained, return false. (Generally, there are two logical subdirectories in the directory. and .. represent the current directory and the upper-level directory respectively). What is read here is the name and not the content.

3. Close the directory: closedir (directory handle);

Example: Recursively delete files

<?php
	/**
	*递归删除指定文件目录下的所有问价及文件夹
	**/
	function RemoveDir($path){
		$path=iconv(&#39;utf-8&#39;,&#39;gbk&#39;,$path);//windows中汉字编码为gbk，而php中使用的是utf-8编码。
		$dir_handle=opendir($path);
		echo "{$path}<br/>";
		while(false!==$file=readdir($dir_handle))//此处用false!==$file是因为有的文件夹如果命名为0的话。会造while（$file=readdir($dir_handle)）条件不满足
		{ 
			if($file==&#39;.&#39;||$file==&#39;..&#39;)//存在逻辑子目录.和..
				continue;
			if(is_dir($path.&#39;/&#39;.$file)){//函数is_dir（文件地址）判断文件是否为目录。
				RemoveDir($path.&#39;/&#39;.$file);
			}else{
				unlink($path.&#39;/&#39;.$file);//unlink(文件地址)删除某个文件。
			}
		}
		closedir($dir_handle);
		return rmdir($path);
	}
	RemoveDir(&#39;./name&#39;);

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Directory operation functions in php (delete, create, judge)_PHP tutorial

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