What are the best practices for setting file permissions (CHMOD) in PHP scripts?

When setting file permissions (CHMOD) in PHP scripts, it is important to follow best practices to ensure security and proper access control. It is recommended to only grant necessary permissions to files and directories, such as read, write, and execute permissions for the owner, and restrict permissions for others. Additionally, it is important to avoid setting permissions to 777 (full access for everyone) as it can pose a security risk. 

// Set file permissions to 0644 for files and 0755 for directories
$filename = 'example.txt';
$directory = 'example_directory';

// Set permissions for file
if (file_exists($filename)) {
    chmod($filename, 0644);
}

// Set permissions for directory
if (is_dir($directory)) {
    chmod($directory, 0755);
}

Keywords

file permissions CHMOD PHP scripts security vulnerabilities

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