How to disable display of directory files in php

In the daily PHP development process, we often need to view the file directory structure in the browser to find the required files or resources. However, this also exposes the directory structure to unauthorized visitors, posing some security threats. Therefore, prohibiting the display of directory files in browsers has become a basic security measure. In PHP, there are some simple ways to suppress the display of directory files.

Usage method one: Configure in the .htaccess file

The most common method is to add a rule to the website's .htaccess file to prevent the browser from displaying directory files. The .htaccess file is a configuration file for the Apache web server. It can set parameters in a virtual host or a specific directory, which can control settings such as permissions, firewalls, directory access, etc.

You can use the following code to add rules that prohibit directory files to the .htaccess file:

Prevent the browser from displaying directory files

Options -Indexes

The above code will disable the browser's access to directory files, that is, when accessing the directory, a "403 Forbidden" error message will be returned.

Method 2: Add code to the PHP file

In addition to configuring the .htaccess file, you can also embed code in the PHP file to achieve the same effect. In the PHP file that needs to prohibit directory files, add the following code:

// Suppress display of directory file list
header('Content-Type:text/html; charset=utf-8');
if(is_dir($_SERVER['PATH_INFO'])) {

header('HTTP/1.1 403 Forbidden');
echo 'Access Denied';
exit();

}
?>

In the above code, first Determine whether the accessed path is a directory. If so, a "403 Forbidden" error message is sent and an "Access Denied" message is output, preventing the browser from displaying the directory file listing.

Usage method three: Modify the Web server configuration

Finally, there is another method is to modify the Web server configuration. For the Apache web server, modifications can be made in Apache's default configuration file /etc/httpd/conf/httpd.conf. Find the following code:

Options Indexes FollowSymLinks
AllowOverride All
Require all granted

In the parameters after "Options", Remove the "Indexes" option to prevent the browser from displaying directory files.

Summary

You can prevent the browser from displaying the directory file list, whether by configuring it in the .htaccess file, embedding code in the PHP file, or modifying the configuration of the web server. This security measure can protect our directory structure and file resources from illegal access and downloading. Therefore, when writing PHP programs, it is recommended that you take these measures to strengthen web security protection.

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