How can the server's activity affect the display of error messages in PHP?

The server's activity can affect the display of error messages in PHP by changing the error_reporting settings. To ensure that error messages are displayed regardless of the server's activity, you can set the error_reporting level in your PHP code to include all types of errors, warnings, and notices.

// Set error reporting to display all types of errors, warnings, and notices
error_reporting(E_ALL);

// Display errors on the screen
ini_set('display_errors', 1);