How can errors in PHP be customized to display alternative text?

To customize errors in PHP to display alternative text, you can use the set_error_handler function to define a custom error handler. This allows you to specify how errors should be handled, including displaying alternative text instead of the default error message.

// Custom error handler function
function customErrorHandler($errno, $errstr, $errfile, $errline) {
    echo "An error occurred: $errstr";
}

// Set custom error handler
set_error_handler("customErrorHandler");

// Trigger an error to test
echo $undefinedVariable;