diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-admin/link-parse-opml.php
--- a/wp/wp-admin/link-parse-opml.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-admin/link-parse-opml.php	Mon Oct 14 17:39:30 2019 +0200
@@ -9,6 +9,9 @@
 if ( ! defined('ABSPATH') )
 	die();
 
+/**
+ * @global string $opml
+ */
 global $opml;
 
 /**
@@ -69,6 +72,11 @@
 }
 
 // Create an XML parser
+if ( ! function_exists( 'xml_parser_create' ) ) {
+	trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
+	wp_die( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
+}
+
 $xml_parser = xml_parser_create();
 
 // Set the functions to handle opening and closing tags