What potential issues could arise when trying to retrieve server information using PHP compared to Java?

One potential issue when trying to retrieve server information using PHP compared to Java is that PHP may not have access to certain server-side configurations or permissions needed to retrieve specific information. To solve this, you can use PHP's built-in functions like `$_SERVER` to access server information that is available to the script.

// Retrieve server information using PHP's $_SERVER superglobal
echo $_SERVER['SERVER_NAME']; // Outputs the server's hostname
echo $_SERVER['SERVER_ADDR']; // Outputs the server's IP address
echo $_SERVER['SERVER_SOFTWARE']; // Outputs the server software being used