ENH PHP 8.1 compatibility

src/Extensions/GridFieldDetailFormItemRequestExtension.php

@@ -47,7 +47,7 @@ class GridFieldDetailFormItemRequestExtension extends Extension
 
         $classes = $component->getClasses($grid);
 
-        if (!count($classes)) {
+        if (!count($classes ?? [])) {
             return false;
         }
 

src/GridFieldAddNewInlineButton.php

@@ -118,7 +118,7 @@ class GridFieldAddNewInlineButton extends AbstractGridFieldComponent implements
     private function getRowTemplate(GridField $grid, GridFieldEditableColumns $editable)
     {
         $columns = ArrayList::create();
-        $handled = array_keys($editable->getDisplayFields($grid));
+        $handled = array_keys($editable->getDisplayFields($grid) ?? []);
 
         if ($grid->getList()) {
             $record = Injector::inst()->create($grid->getModelClass());
@@ -129,7 +129,7 @@ class GridFieldAddNewInlineButton extends AbstractGridFieldComponent implements
         $fields = $editable->getFields($grid, $record);
 
         foreach ($grid->getColumns() as $column) {
-            if (in_array($column, $handled)) {
+            if (in_array($column, $handled ?? [])) {
                 $field = $fields->dataFieldByName($column);
                 $field->setName(sprintf(
                     '%s[%s][{%%=o.num%%}][%s]',
@@ -149,7 +149,7 @@ class GridFieldAddNewInlineButton extends AbstractGridFieldComponent implements
                 $content = str_replace(
                     sprintf('[%s][0]', GridFieldEditableColumns::POST_KEY),
                     sprintf('[%s][{%%=o.num%%}]', self::POST_KEY),
-                    $content
+                    $content ?? ''
                 );
             }
 
@@ -215,7 +215,7 @@ class GridFieldAddNewInlineButton extends AbstractGridFieldComponent implements
             }
 
             if ($list instanceof ManyManyList) {
-                $extra = array_intersect_key($form->getData(), (array) $list->getExtraFields());
+                $extra = array_intersect_key($form->getData() ?? [], (array) $list->getExtraFields());
             }
 
             $item->write(false, false, false, true);

src/GridFieldAddNewMultiClass.php

@@ -124,7 +124,7 @@ class GridFieldAddNewMultiClass extends AbstractGridFieldComponent implements
         $result = array();
 
         if (is_null($this->classes)) {
-            $classes = array_values(ClassInfo::subclassesFor($grid->getModelClass()));
+            $classes = array_values(ClassInfo::subclassesFor($grid->getModelClass()) ?? []);
             sort($classes);
         } else {
             $classes = $this->classes;
@@ -135,7 +135,7 @@ class GridFieldAddNewMultiClass extends AbstractGridFieldComponent implements
             if (!is_string($class)) {
                 $class = $title;
             }
-            if (!class_exists($class)) {
+            if (!class_exists($class ?? '')) {
                 continue;
             }
             $is_abstract = (($reflection = new ReflectionClass($class)) && $reflection->isAbstract());
@@ -216,7 +216,7 @@ class GridFieldAddNewMultiClass extends AbstractGridFieldComponent implements
             throw new Exception('The add new multi class component requires the detail form component.');
         }
 
-        if (!$class || !array_key_exists($class, $classes)) {
+        if (!$class || !array_key_exists($class, $classes ?? [])) {
             throw new HTTPResponse_Exception(400);
         }
 
@@ -241,7 +241,7 @@ class GridFieldAddNewMultiClass extends AbstractGridFieldComponent implements
     {
         $classes = $this->getClasses($grid);
 
-        if (!count($classes)) {
+        if (!count($classes ?? [])) {
             return array();
         }
 
@@ -293,7 +293,7 @@ class GridFieldAddNewMultiClass extends AbstractGridFieldComponent implements
      */
     protected function sanitiseClassName($class)
     {
-        return str_replace('\\', '-', $class);
+        return str_replace('\\', '-', $class ?? '');
     }
 
     /**
@@ -304,6 +304,6 @@ class GridFieldAddNewMultiClass extends AbstractGridFieldComponent implements
      */
     protected function unsanitiseClassName($class)
     {
-        return str_replace('-', '\\', $class);
+        return str_replace('-', '\\', $class ?? '');
     }
 }

src/GridFieldAddNewMultiClassHandler.php

@@ -31,6 +31,6 @@ class GridFieldAddNewMultiClassHandler extends GridFieldDetailForm_ItemRequest
      */
     protected function sanitiseClassName($class)
     {
-        return str_replace('\\', '-', $class);
+        return str_replace('\\', '-', $class ?? '');
     }
 }

src/GridFieldConfigurablePaginator.php

@@ -171,7 +171,7 @@ class GridFieldConfigurablePaginator extends GridFieldPaginator
         $this->pageSizes = $pageSizes;
 
         // Reset items per page
-        $this->setItemsPerPage(current($pageSizes));
+        $this->setItemsPerPage(current($pageSizes ?? []));
 
         return $this;
     }
@@ -356,7 +356,7 @@ class GridFieldConfigurablePaginator extends GridFieldPaginator
             return array(
                 'footer' => $forTemplate->renderWith(
                     __CLASS__,
-                    array('Colspan' => count($gridField->getColumns()))
+                    array('Colspan' => count($gridField->getColumns() ?? []))
                 )
             );
         }

src/GridFieldEditableColumns.php

@@ -61,7 +61,7 @@ class GridFieldEditableColumns extends GridFieldDataColumns implements
         if (!$this->displayFields) {
             // If setDisplayFields() not used, utilize $summary_fields
             // in a way similar to base class
-            $colRelation = explode('.', $col);
+            $colRelation = explode('.', $col ?? '');
             $value = $grid->getDataFieldValue($record, $colRelation[0]);
             $field = $fields->fieldByName($colRelation[0]);
             if (!$field || $field->isReadonly() || $field->isDisabled()) {
@@ -82,7 +82,7 @@ class GridFieldEditableColumns extends GridFieldDataColumns implements
 
             // Fall back to previous logic
             if (!$field) {
-                $rel = (strpos($col, '.') === false); // field references a relation value
+                $rel = (strpos($col ?? '', '.') === false); // field references a relation value
                 $field = ($rel) ? clone $fields->fieldByName($col) : ReadonlyField::create($col);
             }
 
@@ -91,7 +91,7 @@ class GridFieldEditableColumns extends GridFieldDataColumns implements
             }
         }
 
-        if (array_key_exists($col, $this->fieldCasting)) {
+        if (array_key_exists($col, $this->fieldCasting ?? [])) {
             $value = $grid->getCastedValue($value, $this->fieldCasting[$col]);
         }
 
@@ -157,7 +157,7 @@ class GridFieldEditableColumns extends GridFieldDataColumns implements
             }
 
             if ($list instanceof ManyManyList) {
-                $extra = array_intersect_key($form->getData(), (array) $list->getExtraFields());
+                $extra = array_intersect_key($form->getData() ?? [], (array) $list->getExtraFields());
             }
 
             $item->write(false, false, false, true);
@@ -244,7 +244,7 @@ class GridFieldEditableColumns extends GridFieldDataColumns implements
             if (!$field && $list instanceof ManyManyList) {
                 $extra = $list->getExtraFields();
 
-                if ($extra && array_key_exists($col, $extra)) {
+                if ($extra && array_key_exists($col, $extra ?? [])) {
                     $field = Injector::inst()->create($extra[$col], $col)->scaffoldFormField();
                 }
             }
@@ -259,7 +259,7 @@ class GridFieldEditableColumns extends GridFieldDataColumns implements
                     // revert to looking good in cases where the field isn't
                     // available or is readonly
                     //
-                    $colRelation = explode('.', $col);
+                    $colRelation = explode('.', $col ?? '');
                     if ($class && $obj = DataObject::singleton($class)->dbObject($colRelation[0])) {
                         $field = $obj->scaffoldFormField();
                     } else {

src/GridFieldExternalLink.php

@@ -19,7 +19,7 @@ class GridFieldExternalLink extends GridFieldDataColumns
      */
     public function augmentColumns($gridField, &$columns)
     {
-        if (!in_array('Actions', $columns)) {
+        if (!in_array('Actions', $columns ?? [])) {
             $columns[] = 'Actions';
         }
     }

src/GridFieldOrderableRows.php

@@ -205,7 +205,7 @@ class GridFieldOrderableRows extends RequestHandler implements
         if ($list instanceof ManyManyList) {
             $extra = $list->getExtraFields();
 
-            if ($extra && array_key_exists($field, $extra)) {
+            if ($extra && array_key_exists($field, $extra ?? [])) {
                 return;
             }
         } elseif ($list instanceof ManyManyThroughList) {
@@ -239,7 +239,7 @@ class GridFieldOrderableRows extends RequestHandler implements
         if ($list instanceof ManyManyList) {
             $extra = $list->getExtraFields();
             $table = $list->getJoinTable();
-            if ($extra && array_key_exists($field, $extra)) {
+            if ($extra && array_key_exists($field, $extra ?? [])) {
                 return $table;
             }
         } elseif ($list instanceof ManyManyThroughList) {
@@ -277,8 +277,8 @@ class GridFieldOrderableRows extends RequestHandler implements
 
     public function augmentColumns($grid, &$cols)
     {
-        if (!in_array('Reorder', $cols) && $grid->getState()->GridFieldOrderableRows->enabled) {
+        if (!in_array('Reorder', $cols ?? []) && $grid->getState()->GridFieldOrderableRows->enabled) {
-            array_splice($cols, $this->reorderColumnNumber, 0, 'Reorder');
+            array_splice($cols, $this->reorderColumnNumber ?? 0, 0, 'Reorder');
         }
     }
 
@@ -308,7 +308,7 @@ class GridFieldOrderableRows extends RequestHandler implements
             // if it exists, not directly from the record
             $throughListSorts = $this->getSortValuesFromManyManyThroughList($list, $this->getSortField());
 
-            if (array_key_exists($record->ID, $throughListSorts)) {
+            if (array_key_exists($record->ID, $throughListSorts ?? [])) {
                 $currentSortValue = $throughListSorts[$record->ID];
             }
         }
@@ -408,8 +408,8 @@ class GridFieldOrderableRows extends RequestHandler implements
 
         // Get records from the `GridFieldEditableColumns` column
         $gridFieldName = $grid->getName();
-        if (strpos($gridFieldName, '.') !== false) {
+        if (strpos($gridFieldName ?? '', '.') !== false) {
-            $gridFieldName = str_replace('.', '_', $gridFieldName);
+            $gridFieldName = str_replace('.', '_', $gridFieldName ?? '');
         }
 
         $data = $request->postVar($gridFieldName);
@@ -549,7 +549,7 @@ class GridFieldOrderableRows extends RequestHandler implements
         $items = $list->filter('ID', $sortedIDs)->sort($sortterm);
 
         // Ensure that each provided ID corresponded to an actual object.
-        if (count($items) != count($sortedIDs)) {
+        if (count($items ?? []) != count($sortedIDs ?? [])) {
             return false;
         }
 
@@ -720,7 +720,7 @@ class GridFieldOrderableRows extends RequestHandler implements
     protected function getSortTableClauseForIds(DataList $list, $ids)
     {
         if (is_array($ids)) {
-            $value = 'IN (' . implode(', ', array_map('intval', $ids)) . ')';
+            $value = 'IN (' . implode(', ', array_map('intval', $ids ?? [])) . ')';
         } else {
             $value = '= ' . (int) $ids;
         }
@@ -734,7 +734,7 @@ class GridFieldOrderableRows extends RequestHandler implements
             $foreignKey = $this->getManyManyInspectorForeignKey($introspector);
             $foreignID  = (int) $list->getForeignID();
 
-            if ($extra && array_key_exists($this->getSortField(), $extra)) {
+            if ($extra && array_key_exists($this->getSortField(), $extra ?? [])) {
                 return sprintf(
                     '"%s" %s AND "%s" = %d',
                     $key,

tests/GridFieldOrderableRowsTest.php

@@ -69,7 +69,7 @@ class GridFieldOrderableRowsTest extends SapphireTest
         $config = new GridFieldConfig_RelationEditor();
         $config->addComponent($orderable);
 
-        list($parentClass, $parentInstanceID) = explode('.', $fixtureID);
+        list($parentClass, $parentInstanceID) = explode('.', $fixtureID ?? '');
         $parent = $this->objFromFixture($parentClass, $parentInstanceID);
 
         $grid = new GridField(
@@ -83,7 +83,7 @@ class GridFieldOrderableRowsTest extends SapphireTest
         $desiredOrder = [];
 
         // Make order non-contiguous, and 1-based
-        foreach (array_reverse($originalOrder) as $index => $id) {
+        foreach (array_reverse($originalOrder ?? []) as $index => $id) {
             $desiredOrder[$index * 2 + 1] = $id;
         }
 
@@ -183,7 +183,7 @@ class GridFieldOrderableRowsTest extends SapphireTest
         );
 
         $originalOrder = $parent->Children()->column('ID');
-        $desiredOrder = array_reverse($originalOrder);
+        $desiredOrder = array_reverse($originalOrder ?? []);
 
         $this->assertNotEquals($originalOrder, $desiredOrder);
 
@@ -270,7 +270,7 @@ class GridFieldOrderableRowsTest extends SapphireTest
         $desiredOrder = [];
 
         // Make order non-contiguous, and 1-based
-        foreach (array_reverse($originalOrder) as $index => $id) {
+        foreach (array_reverse($originalOrder ?? []) as $index => $id) {
             $desiredOrder[$index * 2 + 1] = $id;
         }
 

tests/OrderableRowsThroughVersionedTest.php

@@ -80,11 +80,11 @@ class OrderableRowsThroughVersionedTest extends SapphireTest
         $originalOrder = $parent->$relationName()->sort($sortName)->column('ID');
         // Ring (un)shift by one, e.g. 3,2,1 becomes 1,3,2.
         // then string key our new order starting at 1
-        $desiredOrder = array_values($originalOrder);
+        $desiredOrder = array_values($originalOrder ?? []);
         array_unshift($desiredOrder, array_pop($desiredOrder));
         $desiredOrder = array_combine(
-            range('1', count($desiredOrder)),
+            range('1', count($desiredOrder ?? [])),
-            $desiredOrder
+            $desiredOrder ?? []
         );
         $this->assertNotEquals($originalOrder, $desiredOrder);
 

tests/Stub/StubA.php

@@ -9,7 +9,7 @@ class StubA implements TestOnly
     public function i18n_singular_name()
     {
         $class = get_class($this);
-        return substr($class, -1);
+        return substr($class ?? '', -1);
     }
 
     public function canCreate()