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vendor/yiisoft/yii2/grid/SerialColumn.php

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+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\grid;
+
+/**
+ * SerialColumn displays a column of row numbers (1-based).
+ *
+ * To add a SerialColumn to the [[GridView]], add it to the [[GridView::columns|columns]] configuration as follows:
+ *
+ * ```php
+ * 'columns' => [
+ *     // ...
+ *     [
+ *         'class' => 'yii\grid\SerialColumn',
+ *         // you may configure additional properties here
+ *     ],
+ * ]
+ * ```
+ *
+ * For more details and usage information on SerialColumn, see the [guide article on data widgets](guide:output-data-widgets).
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+class SerialColumn extends Column
+{
+    /**
+     * {@inheritdoc}
+     */
+    public $header = '#';
+
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function renderDataCellContent($model, $key, $index)
+    {
+        $pagination = $this->grid->dataProvider->getPagination();
+        if ($pagination !== false) {
+            return $pagination->getOffset() + $index + 1;
+        }
+
+        return $index + 1;
+    }
+}