Ticket #11464: 11464.2.diff

wp-admin/includes/update-core.php

@@ -215 +215 @@
  * @return WP_Error|null WP_Error on failure, null on success.
  */
 function update_core($from, $to) {
-        global $wp_filesystem, $_old_files;
+        global $wp_filesystem, $_old_files, $wpdb;
 
         @set_time_limit( 300 );
 
+        //Check for required PHP and MYSQL versions
+        $mysql_version = $wpdb->db_version();
+        $php_version = phpversion();
+        if ( ( version_compare(, '4.1.2', '<') && !file_exists( WP_CONTENT_DIR . '/db.php' ) ) || version_compare(, '4.3', '<') ) {
+                return new WP_Error('not_compatible', sprintf(__('The update cannot be install because you do not have the correct PHP (%1$s vs 4.3 or newer) and mysql versions (%2$s vs 4.1.2 or newer).'), $mysql_version, $php_version) );
+        }
+        
         // Sanity check the unzipped distribution
         apply_filters('update_feedback', __('Verifying the unpacked files'));
         if ( !$wp_filesystem->exists($from . '/wordpress/wp-settings.php') || !$wp_filesystem->exists($from . '/wordpress/wp-admin/admin.php') ||