What is the significance of the open_basedir directive in PHP and how does it affect file operations?

The open_basedir directive in PHP is used to restrict the files that PHP can access to a specific directory or directories. This is important for security reasons as it helps prevent PHP scripts from accessing sensitive files outside of the specified directory. It affects file operations by limiting the files that PHP scripts can read, write, or execute.

// Set the open_basedir directive to restrict file operations to a specific directory
ini_set('open_basedir', '/var/www/html/');