问题是，为什么我的foreach循环只使用上一个数组的信息来渲染metabox？类别代码：

class CusomMetaBox {

/**
 * Hook into the appropriate actions when the class is constructed.
 */
//public function __construct( $post_type, $unicname, $headline, $fieldDisc ) {
public function __construct( $array ) {

global $post;

foreach ( $array as $metabox ) {

  $this->post_type = $metabox[\'post_type\'];
  $this->unicname = $metabox[\'unicname\'];
  $this->headline = $metabox[\'headline\'];
  $this->fieldDisc = $metabox[\'field_desc\'];

add_action( \'add_meta_boxes\', array( $this, \'add_meta_box\' ) );
add_action( \'save_post\', array( $this, \'save\' ), 1, 2);
}
}
here a goes other methods that render and save metaboxes...
public function add_meta_box() {

        add_meta_box(
            $this->unicname
            ,$this->headline
            ,array( $this, \'render_meta_box_content\' )
            ,$this->post_type
            ,\'advanced\'
            ,\'high\'
        );

}

这是函数中的函数。初始化类的php：

function call_createCustomMetaBox() {
new CusomMetaBox( array(
\'eventdata\'=>array(
  \'post_type\'=>\'event\',
  \'unicname\'=>\'eventdata\',
  \'headline\'=>\'Event Date\',
  \'field_desc\'=>\'Enter the date of your event\'
),
\'eventplace\'=>array(
  \'post_type\'=>\'event\',
  \'unicname\'=>\'eventplace\',
  \'headline\'=>\'Place of the event\',
  \'field_desc\'=>\'Enter address of the event\'
),
\'productcost\'=>array(
  \'post_type\'=>\'product\',
  \'unicname\'=>\'productcost\',
  \'headline\'=>\'Cost of the product\',
  \'field_desc\'=>\'Enter the cost of the product. For example: 50.00$ per hour\'
)
) );
}

我想不出，为什么我只得到了1个元框而不是3个（2个在事件帖子中，1个在产品帖子中）？

public function __construct( $array ) { 
global $post;
$this->metabox_array = $array;   
add_action( \'add_meta_boxes\', array( $this, \'add_meta_box\' ) );
add_action( \'save_post\', array( $this, \'save\' ), 1, 2);    
}

//here a goes other methods that render and save metaboxes...
public function add_meta_box() {
   //looping over all input array
foreach ( $this->metabox_array as $metabox ) {

        add_meta_box(
            $metabox[\'unicname\']
            ,$metabox[\'headline\']
            ,array( $this, \'render_meta_box_content\' )
            ,$metabox[\'post_type\']
            ,\'advanced\'
            ,\'high\'
        );

   }

}