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PHP中严格类型数组的一个简单简洁实现。没有额外代码，只有类型检查数组。

用法

首先你需要创建自己的集合类，该类继承自 GenericCollection 并设置其类型

use Pogulailo\Collection\GenericCollection;

class CustomerCollection extends GenericCollection
{
    public function __construct(...$values)
    {
        parent::__construct(Customer::class, ...$values);
    }
}

这就完了，然后你就可以享受到严格类型数组的所有优点

function getCustomers(): CustomerCollection
{
    $customers = new CustomerCollection();
    
    $customers->append(new Customer());
    $customers->append(new Customer());
    $customers->append(new Customer());
    
    return $customers;
}

function doSomething(CustomerCollection $customers): void
{
    foreach ($customers as $customer) {
        // Do what you need to do
    }
}

$customers = getCustomers();
doSomething($customers);

你也可以选择不创建自己的集合类，但这样你可能需要做额外的类型检查

use Pogulailo\Collection\GenericCollection;

function getCustomers(): GenericCollection
{
    $customers = new GenericCollection(Customer::class);
    
    $customers->append(new Customer());
    $customers->append(new Customer());
    $customers->append(new Customer());
    
    return $customers;
}

function doSomething(GenericCollection $customers): void
{
    // In this case, you need to check the collection type first
    if ($customers->getType() !== Customer::class) {
        throw new Exception('I need customers, more customers...')
    }
    
    foreach ($customers as $customer) {
        // Do what you need to do
    }
}

$customers = getCustomers();
doSomething($customers);