How to format date in listing page - php

Question

I am new to Yii framework and just started to work on an existing website. I have a listing page and my requirement was to add a new field 'review_date_time' and I could managed to display it in listing. Now my question is how to change the format of the date and how to show a white space if date is not there in table field.Right now it is displaying 0000-00-00 00:00:00 if no date is there.
My code for listing
$this->widget('zii.widgets.grid.CGridView', array(
'id' => 'series-grid',
'dataProvider' => $model->search(),
'filter' => $model,
'columns' => array(
array('header' => 'Category', 'name' => 'category.title'),
'exam_year',
'title',
'review_date_time',
array(
'class' => 'CButtonColumn',
),
),
));

Answer 1

If it is showing 0000-00-00 00:00:00 then it means that, that value is the default value in the db table, hence you'll have to use the value property of CDataColumn:
$this->widget('zii.widgets.grid.CGridView', array(
'id' => 'series-grid',
'dataProvider' => $model->search(),
'filter' => $model,
// 'nullDisplay'=>'',
'columns' => array(
array('header' => 'Category', 'name' => 'category.title'),
'exam_year',
'title',
// 'review_date_time',
array(
'name'=>'review_date_time',
'value'=>'$data->review_date_time=="0000-00-00 00:00:00"?"":$data->review_date_time'
)
array(
'class' => 'CButtonColumn',
),
),
));
Or try the nullDisplay property of CGridView (if you are storing null and overriding afterFind to format null as 0000-00-00 00:00:00):
$this->widget('zii.widgets.grid.CGridView', array(
'id' => 'series-grid',
'dataProvider' => $model->search(),
'filter' => $model,
'nullDisplay'=>'',
'columns' => array(
array('header' => 'Category', 'name' => 'category.title'),
'exam_year',
'title',
'review_date_time',
array(
'class' => 'CButtonColumn',
),
),
));