improve gridview phpdoc

framework/grid/CheckboxColumn.php

@@ -29,10 +29,10 @@ use yii\helpers\Html;
  * Users may click on the checkboxes to select rows of the grid. The selected rows may be
  * obtained by calling the following JavaScript code:
  *
- * ~~~
+ * ```javascript
  * var keys = $('#grid').yiiGridView('getSelectedRows');
  * // keys is an array consisting of the keys associated with the selected rows
- * ~~~
+ * ```
  *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
@@ -46,6 +46,19 @@ class CheckboxColumn extends Column
     /**
      * @var array|\Closure the HTML attributes for checkboxes. This can either be an array of
      * attributes or an anonymous function ([[Closure]]) that returns such an array.
+     * The signature of the function should be the following: `function ($model, $key, $index, $column)`.
+     * Where `$model`, `$key`, and `$index` refer to the model, key and index of the row currently being rendered
+     * and `$column` is a reference to the [[CheckboxColumn]] object.
+     * A function may be used to assign different attributes to different rows based on the data in that row.
+     * Specifically if you want to set a different value for the checkbox
+     * you can use this option in the following way (in this example using the `name` attribute of the model):
+     *
+     * ```php
+     * 'checkboxOptions' => function($model, $key, $index, $column) {
+     *     return ['value' => $model->name];
+     * }
+     * ```
+     *
      * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
      */
     public $checkboxOptions = [];

framework/grid/Column.php

@@ -34,6 +34,8 @@ class Column extends Object
     /**
      * @var callable This is a callable that will be used to generated the content of each cell.
      * The signature of the function should be the following: `function ($model, $key, $index, $column)`.
+     * Where `$model`, `$key`, and `$index` refer to the model, key and index of the row currently being rendered
+     * and `$column` is a reference to the [[Column]] object.
      */
     public $content;
     /**
@@ -54,6 +56,8 @@ class Column extends Object
      * @var array|\Closure the HTML attributes for the data cell tag. This can either be an array of
      * attributes or an anonymous function ([[Closure]]) that returns such an array.
      * The signature of the function should be the following: `function ($model, $key, $index, $column)`.
+     * Where `$model`, `$key`, and `$index` refer to the model, key and index of the row currently being rendered
+     * and `$column` is a reference to the [[Column]] object.
      * A function may be used to assign different attributes to different rows based on the data in that row.
      *
      * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.

framework/grid/DataColumn.php

@@ -56,13 +56,18 @@ class DataColumn extends Column
      */
     public $encodeLabel = true;
     /**
-     * @var string|\Closure an anonymous function that returns the value to be displayed for every data model.
-     * The signature of this function is `function ($model, $key, $index, $column)`.
-     * If this is not set, `$model[$attribute]` will be used to obtain the value.
+     * @var string|\Closure an anonymous function or a string that is used to determine the value to display in the current column.
+     *
+     * If this is an anonymous function, it will be called for each row and the return value will be used as the value to
+     * display for every data model. The signature of this function should be: `function ($model, $key, $index, $column)`.
+     * Where `$model`, `$key`, and `$index` refer to the model, key and index of the row currently being rendered
+     * and `$column` is a reference to the [[DataColumn]] object.
      *
      * You may also set this property to a string representing the attribute name to be displayed in this column.
      * This can be used when the attribute to be displayed is different from the [[attribute]] that is used for
      * sorting and filtering.
+     *
+     * If this is not set, `$model[$attribute]` will be used to obtain the value, where `$attribute` is the value of [[attribute]].
      */
     public $value;
     /**

framework/grid/SerialColumn.php

@@ -27,6 +27,9 @@ namespace yii\grid;
  */
 class SerialColumn extends Column
 {
+    /**
+     * @inheritdoc
+     */
     public $header = '#';