Warum endet require() bei einem Fehler mit einem Fatal Error, während include() nur ein Warning erzeugt?

The main difference between require() and include() in PHP is how they handle errors. When require() is used and the file being included cannot be found, it will result in a Fatal Error, halting the script execution. On the other hand, include() will only produce a Warning and the script will continue to run. To handle errors more gracefully, it is recommended to use require() when including essential files that are crucial for the script to function properly.

// Using require() to include a file that is essential for the script
require('essential_file.php');

// Using include() to include a file that is not crucial for the script
include('optional_file.php');