array_column()提取二维数组中某个值

<?php
    $multipleCommodity = array(
            =>array('name'=>'花花','age'=>),
            =>array('name'=>'草草','age'=>)
        );
    $arr1=array_column($multipleCommodity,'name');
    $str1=implode(',',$arr1);
    echo $str1;

 ?>