Practical examples of PHP7 underlying development principles: implementing efficient PHP applications

A practical case of PHP7 underlying development principles: realizing efficient PHP applications

With the rapid development of the Internet, PHP, as an open source scripting language, is widely used For web application development. However, as the scale of PHP applications continues to expand, performance issues gradually surface. As PHP developers, we should have a deep understanding of the underlying development principles of PHP and learn to use these principles to improve program efficiency.

This article will use a practical case to show how to use the underlying development principles of PHP7 to implement efficient PHP applications.

Case Background
Suppose we are developing an e-commerce website and need to implement order processing logic after the user places an order. To simplify the example, we assume that the order information has been stored in the database, and we need to call different payment interfaces to process the order according to the different payment methods selected by the user.

Traditional PHP development method
In the traditional PHP development method, we may implement the order processing logic through the following code:

// 获取用户选择的支付方式
$paymentMethod = $_POST['payment_method'];

// 根据支付方式调用不同的支付接口处理订单
if ($paymentMethod == 'alipay') {
    $alipay = new Alipay();
    $alipay->processOrder($order);
} elseif ($paymentMethod == 'wechat_pay') {
    $wechatPay = new WechatPay();
    $wechatPay->processOrder($order);
} elseif ($payment_method == 'credit_card') {
    $creditCard = new CreditCard();
    $creditCard->processOrder($order);
}

This method is functionally feasible Yes, but when the order processing logic becomes complex, the code will become bloated, and the corresponding payment interface class needs to be dynamically loaded every time order processing is executed, which reduces the efficiency of the program.

Solution using the underlying development principles of PHP7
In PHP7, a new feature is introduced - extended static information table (Static Lookup Tables), which can be used to improve the search speed of functions and classes. We can use this feature to store the mapping relationship between the payment method and the corresponding payment interface class in advance, thereby reducing the loading and search time for each request.

First, we need to create a static information table to store the mapping relationship between payment methods and payment interface classes. Here, we can use PHP arrays to implement:

$paymentMethodMap = [
    'alipay' => 'Alipay',
    'wechat_pay' => 'WechatPay',
    'credit_card' => 'CreditCard'
];

Then, we can implement the order processing logic through the following code:

// 获取用户选择的支付方式
$paymentMethod = $_POST['payment_method'];

// 根据支付方式从静态信息表中获取支付接口类名
$paymentClass = $paymentMethodMap[$paymentMethod];

// 根据支付接口类名动态加载支付接口类并处理订单
$payment = new $paymentClass();
$payment->processOrder($order);

Through the above code, we can see that there is no need for each The corresponding payment interface class is dynamically loaded during each request. On the contrary, we store the mapping relationship between the payment method and the payment interface class in the static information table, directly obtain the corresponding payment interface class name from the static information table according to the payment method selected by the user, and instantiate the payment through dynamic loading. Interface class. The advantage of this is that it reduces the time of file loading and class search, and improves the efficiency of the program.

Conclusion
Through the above cases, we can have an in-depth understanding of the application of PHP7's underlying development principles in actual development. Using the extended static information table feature, we can store more static information, thereby improving the search speed of functions and classes, and ultimately achieving efficient PHP applications.

Of course, the underlying development principles of PHP are far more than this, and there are many other optimization techniques and features worth exploring and learning. As PHP developers, we should continue to learn and research the underlying development principles of PHP, constantly improve our technical level, and contribute to the development of efficient PHP applications.

Reference materials:

• PHP official documentation: https://www.php.net/
• Laravel framework documentation: https://laravel.com/
• Symfony framework documentation: https://symfony.com/

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