在使用Yii1框架和PHP 5.6.40的生产环境中，array_column函数返回一个空数组。
该数组是另一个CActiveRecord的HAS_MANY关系中的CActiveRecords列表。在我的本地机器上（PHP 7.1.23），array_column函数正常工作。除非我理解有误，否则文档说array_column在PHP 5.6.40可用。
该数组是另一个CActiveRecord的HAS_MANY关系中的CActiveRecords列表。在我的本地机器上（PHP 7.1.23），array_column函数正常工作。除非我理解有误，否则文档说array_column在PHP 5.6.40可用。
/**
* This is the model class for table 'my_active_record'.
*
* The following are the available columns in table 'my_active_record':
* @property integer $id
*
* The following are the available model relations:
* @property RelatedActiveRecord[] $relatedActiveRecords
*/
class MyActiveRecord extends CActiveRecord
{
public function relations()
{
return array(
'relatedActiveRecords' => array(self::HAS_MANY, 'related_active_records', 'my_active_record_id')
);
}
}
/**
* This is the model class for table 'related_active_record'.
*
* The following are the available columns in table 'related_active_record':
* @property integer $id
* @property integer $my_active_record_id
*
* The following are the available model relations:
* @property MyActiveRecord $myActiveRecord
*/
class MyActiveRecord extends CActiveRecord
{
public function relations()
{
return array(
'myActiveRecord' => array(self::BELONGS_TO, 'my_active_record', 'my_active_record_id')
);
}
}
$myActiveRecord = new MyActiveRecord();
print_r(array_column($myActiveRecord->relatedActiveRecords, 'id'));
预期结果: 数组 ( [0] => 1 [1] => 2 [2] => 3 )
实际结果: 数组 ( )。