PHP如何取消多维数组的成员？

Question

我有一个看起来像这样的三维数组

Array(
[Group 1] => Array
    (
        [0] => Array
            (
                [category] => Group1
                [firstname] => John
                [lastname] => Johns
                [image] => /mysite.etc/jj.jpg
            )
        [1] => Array
            (
                [category] => Group1
                [firstname] => John
                [lastname] => James
                [image] => /mysite.etc/jj2.jpg
            )
    )
[Group 2] => Array
    (
        [0] => Array
            (
                [category] => Group2
                [firstname] => John
                [lastname] => Jackson
                [image] => NULL
            )
        [1] => Array
            (
                [category] => Group2
                [firstname] => John
                [lastname] => Jimson
                [image] => /mysite.etc/jj4.jpg   
            )
    )...etc)

我正在尝试遍历数组并删除people在[image]单元格中没有值的任何(即数组的第二级).

我试过了

foreach($MyArray as $Key=>&$group){ 
    foreach($group as &$staff){ 
        if(!file_exists($staff['image'])){
            unset($staff);
        }
    } 
}

但这不会删除没有图像的数组项.循环正确地识别没有图像的人员,好像我包含一些代码以将它们回显到页面上,这是有效的.它只是没有从$MyArray阵列中取消它们.

谁能帮我实现这个目标？

Answer 1

foreach($MyArray as $Key=>$group){
     foreach($group as $k=>$staff){ 
         if( !file_exists($staff['image'])) {
             unset($MyArray[$Key][$k]);
          }
     }
}

//你应该知道$ group和$ staff是临时变量