PHP仅使用一个标题按类别转换数组组

我有这个阵列：

$result = array(
    '0' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-1', 
    ), 
    '1' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-2'
    ), 
    '2' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-3'
    ), 
    '3' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-4'
    ), 
    '4' => array(
        'field_categories' => 'Doctor', 
        'field_name' => 'Doctor-1'
    ), 
    '5' => array(
        'field_categories' => 'Doctor', 
        'field_name' => 'Doctor-2'
    ), 
    '6' => array(
        'field_categories' => 'Manager', 
        'field_name' => 'Manager-1'
    ), 
    '7' => array(
        'field_categories' => 'Manager', 
        'field_name' => 'Manager-2'
    ), 
    '8' => array(
        'field_categories' => 'Manager', 
        'field_name' => 'Manager-3'
    )
);
echo '<pre>',print_r($result),'</pre>';

---

如果您正在尝试重复数据消除

field\u name

和

field\u categories

，则可以将每个值分配给数组的键，然后执行

array\u翻转

$result = array(
    '0' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-1', 
    ), 
    '1' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-2'
    ), 
    '2' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-3'
    ), 
    '3' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-4'
    ), 
    '4' => array(
        'field_categories' => 'Doctor', 
        'field_name' => 'Doctor-1'
    ), 
    '5' => array(
        'field_categories' => 'Doctor', 
        'field_name' => 'Doctor-2'
    ) );

 foreach($result as $key=>$val)
    {
      $newarray[$val['field_categories']][] = $val['field_name'];
    }

print_r( $newarray);

---

只需在回显语句之前添加此行：

Array
(
    [Visitor] => Array
        (
            [0] => Visitor-1
            [1] => Visitor-2
            [2] => Visitor-3
            [3] => Visitor-4
        )

    [Doctor] => Array
        (
            [0] => Doctor-1
            [1] => Doctor-2
        )

)

输出

---

为什么是-4+我为你准备好了。

$result = array_map(function($e){return isset($e['field_name'])?$e['field_name']:null;} , $result);

$result = array(
    '0' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-1', 
    ), 
    '1' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-2'
    ), 
    '2' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-3'
    ), 
    '3' => array(
        'field_categories' => 'Visitor', 
        'field_name' => 'Visitor-4'
    ), 
    '4' => array(
        'field_categories' => 'Doctor', 
        'field_name' => 'Doctor-1'
    ), 
    '5' => array(
        'field_categories' => 'Doctor', 
        'field_name' => 'Doctor-2'
    ) );

 foreach($result as $key=>$val)
    {
      $newarray[$val['field_categories']][] = $val['field_name'];
    }

print_r( $newarray);

Array
(
    [Visitor] => Array
        (
            [0] => Visitor-1
            [1] => Visitor-2
            [2] => Visitor-3
            [3] => Visitor-4
        )

    [Doctor] => Array
        (
            [0] => Doctor-1
            [1] => Doctor-2
        )

)