PHP二维数组根据某个键进行排序

有个用户的二维数组

$arr = [
    ['id' => 1, 'name' => 'Alexander', 'age' => 26],
    ['id' => 4, 'name' => 'James', 'age' => 18],
    ['id' => 3, 'name' => 'David', 'age' => 22],
    ['id' => 7, 'name' => 'Anthony', 'age' => 25],
    ['id' => 5, 'name' => 'Emily', 'age' => 18],
    ['id' => 8, 'name' => 'Elizabeth', 'age' => 23],
    ['id' => 2, 'name' => 'Lauren', 'age' => 18],
    ['id' => 6, 'name' => 'Alyssa', 'age' => 17]
];

当需要用户年龄(age)来进行从小到大排序时

$sort_column = array_column($arr, 'age');
array_multisort($sort_column, SORT_ASC, $arr);

$arr数组会变成这样

$arr = [
	['id' => 6, 'name' => 'Alyssa', 'age' => 17],
	['id' => 2, 'name' => 'Lauren', 'age' => 18],
	['id' => 4, 'name' => 'James', 'age' => 18],
	['id' => 5, 'name' => 'Emily', 'age' => 18],
	['id' => 3, 'name' => 'David', 'age' => 22],
	['id' => 8, 'name' => 'Elizabeth', 'age' => 23],
	['id' => 7, 'name' => 'Anthony', 'age' => 25],
	['id' => 1, 'name' => 'Alexander', 'age' => 26],
];

当需要用户年龄(age)来进行从小到大,并且用户编号(id)从大到小排序时

foreach ($arr as $key => $value) {
    $id_arr[] = $value['id'];
    $age_arr[] = $value['age'];
}
array_multisort($age_arr, SORT_ASC, $id_arr, SORT_DESC, $arr);

$arr数组会变成这样

$arr = [
	['id' => 6, 'name' => 'Alyssa', 'age' => 17],
	['id' => 5, 'name' => 'Emily', 'age' => 18],
	['id' => 4, 'name' => 'James', 'age' => 18],
	['id' => 2, 'name' => 'Lauren', 'age' => 18],
	['id' => 3, 'name' => 'David', 'age' => 22],
	['id' => 8, 'name' => 'Elizabeth', 'age' => 23],
	['id' => 7, 'name' => 'Anthony', 'age' => 25],
	['id' => 1, 'name' => 'Alexander', 'age' => 26],
];

最后更新： 2024年04月12日 02:44

原始链接： https://xiaguochang.github.io/posts/b749b54d/

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