laravel集合函数—each()

each() 用于迭代集合中的每个元素

$collection = collect(['one', 'two', 'three', 'four']);

$data = [];
$collection->each(function($item, $key) use(&$data) {
    // 满足条件则 停止迭代
    if($item == 'three' || $key == 2) {
        return false;
    }
    $data[] = $item;
});    
return $data; // ["one","two"]