Question

我有一个非常大且变化的二维数组，但结构如下：

"MySetup.exe" /MyVar="Hello world"

我想得到类似于array 0 => array 'id' => string '6' 'name' => string 'Adams Clasp' 1 => array 'id' => int 185 'name' => string 'Acrylic' 2 => array 'id' => string '268' 'name' => string 'Adams Clasp (Splints)' 3 => array 'id' => int 11 'name' => string 'Arrow Clasp' 4 => array 'id' => int 11 'name' => string 'Arrow Clasp' 5 => array 'id' => string '0' 'name' => string 'Labial Bow' 6 => array 'id' => string '6' 'name' => string 'Adams Clasp' 7 => array 'id' => string '6' 'name' => string 'Adams Clasp'数组的输出，如果它不是多维/只是键和array_count_values()，除了保留关联的name作为价值并保持多维。在此示例中，输出应如下所示：

'id'

正在运行array 'Adams Clasp' => array 'id' => string '6' 'count' => int 3 'Acrylic' => array 'id' => int 185 'count' => int 1 'Adams Clasp (Splints)' => array 'id' => string '268' 'count => int 1 'Arrow Clasp' => array 'id' => int 11 'count' => int 2 'Labial Bow' => array 'id' => string '0' 'count' => int 1

Answer 1

正确构造的foreach循环可以解决这个问题。首次找到名称时，将其设置为键，并为其声明默认子阵列（id和count = 0）。然后只需增加每次出现的计数值。

代码：（Demo）

$array=[ 
    ['id'=>'6','name'=>'Adams Clasp'],
    ['id'=>185,'name'=>'Acrylic'],
    ['id'=>'268','name'=>'Adams Clasp (Splints)'],
    ['id'=>11,'name'=>'Arrow Clasp'],
    ['id'=>11,'name'=>'Arrow Clasp'],
    ['id'=>'0','name'=>'Labial Bow'],
    ['id'=>'6','name'=>'Adams Clasp'],
    ['id'=>'6','name'=>'Adams Clasp']
];

foreach($array as $a){
    if(!isset($result[$a['name']])){
        $result[$a['name']]=['id'=>$a['id'],'count'=>0];
    }
    ++$result[$a['name']]['count'];
}
var_export($result);

输出：

array (
  'Adams Clasp' => 
  array (
    'id' => '6',
    'count' => 3,
  ),
  'Acrylic' => 
  array (
    'id' => 185,
    'count' => 1,
  ),
  'Adams Clasp (Splints)' => 
  array (
    'id' => '268',
    'count' => 1,
  ),
  'Arrow Clasp' => 
  array (
    'id' => 11,
    'count' => 2,
  ),
  'Labial Bow' => 
  array (
    'id' => '0',
    'count' => 1,
  ),
)

Answer 2

Variant使用数组函数：

$array = [
    ['id' => '6','name' => 'Adams Clasp'],
    ['id' => 185,'name' => 'Acrylic'],
    ['id' => '268','name' => 'Adams Clasp (Splints)'],
    ['id' => 11,'name' => 'Arrow Clasp'],
    ['id' => 11,'name' => 'Arrow Clasp'],
    ['id' => '0','name' => 'Labial Bow'],
    ['id' => '6','name' => 'Adams Clasp'],
    ['id' => '6','name' => 'Adams Clasp'],

];
$ids = array_column($array , 'name' , 'id');

array_map(function($count , $id , $name)use(&$out){
    $out[$name] = ['id' =>  $id, 'count' => $count];
} , array_count_values(array_column($array , 'name')) , array_keys($ids),array_values($ids));

print_r($out);

PHP：返回多维数组中某些值的计数，但保留其他值，即id

2 个答案: