What are the implications of using PATH_INFO in the $_SERVER superglobal when working with Apache and PHP?

Using PATH_INFO in the $_SERVER superglobal when working with Apache and PHP can expose your application to potential security risks, such as path traversal attacks. To mitigate this risk, it is recommended to sanitize and validate the PATH_INFO variable before using it in your application. 

// Sanitize and validate the PATH_INFO variable before using it
$path_info = isset($_SERVER['PATH_INFO']) ? $_SERVER['PATH_INFO'] : '';
$path_info = filter_var($path_info, FILTER_SANITIZE_URL);

// Use the sanitized PATH_INFO variable in your application
echo "Path Info: " . $path_info;

Keywords

PATH_INFO $_SERVER superglobal Apache PHP implications

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