如何以升序形式对多维数组进行排序？

Question

Here is the array. What I want is I wanna sort the array on the basis on 'income_difference' in ascending order. If possible, I just want 3 data with least income difference.

array:5 [▼
  0 => array:4 [▼
    "month" => "11"
    "income_times" => 2
    "income_amount" => 52300
    "income_difference" => 49000
  ]
  1 => array:4 [▼
    "month" => "10"
    "income_times" => 1
    "income_amount" => 50000
    "income_difference" => 46700
  ]
  2 => array:4 [▼
    "month" => "09"
    "income_times" => 1
    "income_amount" => 5000000
    "income_difference" => 4996700
  ]
  3 => array:4 [▼
    "month" => "08"
    "income_times" => 1
    "income_amount" => 50000
    "income_difference" => 46700
  ]
  4 => array:4 [▼
    "month" => "06"
    "income_times" => 1
    "income_amount" => 5200
    "income_difference" => 1900
  ]
]

Answer 1

Use usort:

usort($data, function($a, $b) {
    return $a['income_difference'] - $b['income_difference'];
});