如何在PHP循环中基于同一个键组合数组值

我试图在foreach循环中创建一个数组，在这个数组中，特定医生的患者按药物计数，但我在数组中只得到一个数字，这是错误的，因为我正在生成一个带有响应的图表，我需要所有患者在一个数组中计数。此外，如果该医生没有该药物的数据，则需要为0

这是来自服务器的当前响应

array:5 
  0 => array:4 
    "patientsCount" => 2
    "brand_name" => "Medicine 1"
    "month" => "April"
    "physician_name" => "John Doe"
  ]
  1 => array:4 
    "patientsCount" => 1
    "brand_name" => "Medicine 2"
    "month" => "April"
    "physician_name" => "Jane Doe"
  ]
  2 => array:4 
    "patientsCount" => 5
    "brand_name" => "Medicine 3"
    "month" => "July"
    "physician_name" => "John Doe"
  ]
  3 => array:4 
    "patientsCount" => 5
    "brand_name" => "Medicine 2"
    "month" => "July"
    "physician_name" => "Jane Doe"
  ]
  4 => array:4 
    "patientsCount" => 2
    "brand_name" => "Medicine 4"
    "month" => "June"
    "physician_name" => "John Doe"
  ]
]

在我的foreach循环中，我正在这样做

$arr[ $item['physician_name'] ] = [ $item['patientsCount'] ];

这给了我这个

    array:2 
      "John Doe" => array:1 
        0 => 2
      ]
      "Jane Doe" => array:1 
        0 => 5
      ]
    ]

我的预期结果是这样的

  0 => array:5 
        "label" => "John Doe"
        "data" => array:5 
          0 => 3
          1 => 0
          2 => 8
          3 => 7
          4 => 4
        ]
        "borderWidth" => 1
        "backgroundColor" => "rgba(226,46,111,0.2)"
        "borderColor" => "rgba(226,46,111,1)"
      ]
      1 => array:5 
        "label" => "Jane Doe"
        "data" => array:5
          0 => 6
          1 => 7
          2 => 0
          3 => 11
          4 => 4
        ]
        "borderWidth" => 1
        "backgroundColor" => "rgba(226,46,111,0.2)"
        "borderColor" => "rgba(226,46,111,1)"
      ]
    ]

如何获取所需的数组？

在

$arr[ $item['physician_name'] ] = [ $item['patientsCount'] ];

您将使用包含

$item['patientsCount']

的数组不断覆盖数组的同一元素。您想要的是添加到此数组中

 $arr[ $item['physician_name'] ][] = $item['patientsCount'];

注意

=

左侧的

[]

，这意味着将值添加到此数组的末尾