diff --git a/includes/bootstrap.inc b/includes/bootstrap.inc
index fe14dacd81..d53d3732be 100644
--- a/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -3775,11 +3775,9 @@ function _drupal_shutdown_function() {
   // was in the normal context of execution.
   chdir(DRUPAL_ROOT);
 
-  reset($callbacks);
   try {
-    while ($callback = current($callbacks)) {
+    foreach ($callbacks as &$callback) {
       call_user_func_array($callback['callback'], $callback['arguments']);
-      next($callbacks);
     }
   }
   catch (Exception $exception) {
diff --git a/includes/menu.inc b/includes/menu.inc
index f5537ffc3e..ca37ba509d 100644
--- a/includes/menu.inc
+++ b/includes/menu.inc
@@ -576,7 +576,6 @@ function _menu_load_objects(&$item, &$map) {
           // 'load arguments' in the hook_menu() entry, but they need
           // some processing. In this case the $function is the key to the
           // load_function array, and the value is the list of arguments.
-          reset($function);
           $args = current($function);
           $function = key($function);
           $load_functions[$index] = $function;
@@ -2404,8 +2403,8 @@ function menu_set_active_trail($new_trail = NULL) {
       // a stripped down menu tree containing the active trail only, in case
       // the given menu has not been built in this request yet.
       $tree = menu_tree_page_data($preferred_link['menu_name'], NULL, TRUE);
-      reset($tree);
       $curr = current($tree);
+      next($tree);
     }
     // There is no link for the current path.
     else {
@@ -2434,7 +2433,6 @@ function menu_set_active_trail($new_trail = NULL) {
           }
         }
         $tree = $curr['below'] ? $curr['below'] : array();
-        reset($tree);
       }
       $curr = current($tree);
       next($tree);
diff --git a/includes/module.inc b/includes/module.inc
index f8e229dd78..4c2b3fbeeb 100644
--- a/includes/module.inc
+++ b/includes/module.inc
@@ -404,7 +404,11 @@ function module_enable($module_list, $enable_dependencies = TRUE) {
     // Create an associative array with weights as values.
     $module_list = array_flip(array_values($module_list));
 
+    // The array is iterated over manually (instead of using a foreach) because
+    // modules may be added to the list within the loop and we need to process
+    // them.
     while ($module = key($module_list)) {
+      next($module_list);
       if (!isset($module_data[$module])) {
         // This module is not found in the filesystem, abort.
         return FALSE;
@@ -423,8 +427,6 @@ function module_enable($module_list, $enable_dependencies = TRUE) {
           $module_list[$dependency] = 0;
         }
       }
-
-      next($module_list);
     }
 
     if (!$module_list) {
@@ -542,7 +544,11 @@ function module_disable($module_list, $disable_dependents = TRUE) {
     $module_list = array_flip(array_values($module_list));
 
     $profile = drupal_get_profile();
+    // The array is iterated over manually (instead of using a foreach) because
+    // modules may be added to the list within the loop and we need to process
+    // them.
     while ($module = key($module_list)) {
+      next($module_list);
       if (!isset($module_data[$module]) || !$module_data[$module]->status) {
         // This module doesn't exist or is already disabled, skip it.
         unset($module_list[$module]);
@@ -557,8 +563,6 @@ function module_disable($module_list, $disable_dependents = TRUE) {
           $module_list[$dependent] = 0;
         }
       }
-
-      next($module_list);
     }
 
     // Sort the module list by pre-calculated weights.
diff --git a/modules/book/book.module b/modules/book/book.module
index 12580ef5b6..32047f93f5 100644
--- a/modules/book/book.module
+++ b/modules/book/book.module
@@ -768,6 +768,7 @@ function book_prev($book_link) {
     return NULL;
   }
   $flat = book_get_flat_menu($book_link);
+  reset($flat);
   $curr = NULL;
   do {
     $prev = $curr;
@@ -807,6 +808,7 @@ function book_prev($book_link) {
  */
 function book_next($book_link) {
   $flat = book_get_flat_menu($book_link);
+  reset($flat);
   do {
     $key = key($flat);
     next($flat);
diff --git a/modules/simpletest/drupal_web_test_case.php b/modules/simpletest/drupal_web_test_case.php
index 3124ffe82a..3715ff1be2 100644
--- a/modules/simpletest/drupal_web_test_case.php
+++ b/modules/simpletest/drupal_web_test_case.php
@@ -1128,7 +1128,11 @@ class DrupalWebTestCase extends DrupalTestCase {
         }
       }
     }
-    usort($files, array($this, 'drupalCompareFiles'));
+    $d_compare='drupalCompareFiles';
+    // For php 7.2 replace return array() with function lambda.
+    usort($files, function($this, $d_compare) {
+      return array($this, $d_compare);
+    });
     return $files;
   }