Laravel 8 sortBy() {#collection-method}
2021-07-19 09:47 更新
sortBy 方法将根据指定键对集合进行排序。排序后的集合会保留原始数组的键，所以在这个例子中我们使用 values 方法将键重置为连续编号的索引：
$collection = collect([
['name' => 'Desk', 'price' => 200],
['name' => 'Chair', 'price' => 100],
['name' => 'Bookcase', 'price' => 150],
]);
$sorted = $collection->sortBy('price');
$sorted->values()->all();
/*
[
['name' => 'Chair', 'price' => 100],
['name' => 'Bookcase', 'price' => 150],
['name' => 'Desk', 'price' => 200],
]
*/此方法接受排序标志作为其第二个参数：
$collection = collect([
['title' => 'Item 1'],
['title' => 'Item 12'],
['title' => 'Item 3'],
]);
$sorted = $collection->sortBy('title', SORT_NATURAL);
$sorted->values()->all();
/*
[
['title' => 'Item 1'],
['title' => 'Item 3'],
['title' => 'Item 12'],
]
*/或者，你可以通过你自己的回调来决定如何排序集合的值:
$collection = collect([
['name' => 'Desk', 'colors' => ['Black', 'Mahogany']],
['name' => 'Chair', 'colors' => ['Black']],
['name' => 'Bookcase', 'colors' => ['Red', 'Beige', 'Brown']],
]);
$sorted = $collection->sortBy(function ($product, $key) {
return count($product['colors']);
});
$sorted->values()->all();
/*
[
['name' => 'Chair', 'colors' => ['Black']],
['name' => 'Desk', 'colors' => ['Black', 'Mahogany']],
['name' => 'Bookcase', 'colors' => ['Red', 'Beige', 'Brown']],
]
*/
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