PHP8 underlying development principles: the secret to improving server performance

PHP8 underlying development principles: the secret of improving server performance

Abstract: This article will introduce the underlying development principles of PHP8 and explore how to improve server performance by optimizing the underlying code. The article will demonstrate some key technologies and optimization strategies for the underlying development of PHP8 in the form of code examples. Readers will understand the secrets of the underlying development of PHP8 and how to use these technologies to improve server performance.

Introduction:

PHP is a scripting language widely used in Web development. Its simplicity, ease of use and high flexibility make it the preferred language for Web development. However, when processing a large number of concurrent requests and complex business logic, PHP's performance often becomes a bottleneck. In order to solve this problem, PHP8 introduces some underlying development optimizations to improve server performance. This article takes an in-depth look at these optimization strategies and demonstrates their effectiveness through code examples.

1. JIT compiler optimization

In PHP8, the JIT (Just-In-Time) compiler is introduced, which can dynamically compile PHP code into local machine code, thereby improving Code execution efficiency. The following is a simple sample code:

<?php
function fibonacci(int $n): int {
    if ($n <= 1) {
        return $n;
    }
    return fibonacci($n - 1) + fibonacci($n - 2);
}

$start = microtime(true);

echo "Fibonacci(30) = " . fibonacci(30) . "
";

$end = microtime(true);
$executionTime = ($end - $start) * 1000;
echo "Execution time: " . $executionTime . " ms
";

In PHP7 and previous versions, the method of recursively calculating the Fibonacci sequence will perform very slowly. But in PHP8, by enabling the JIT compiler, we can obviously observe an increase in calculation speed. You can enable the JIT compiler and test the code by executing php -d jit=1205 fibo.php in the terminal.

2. Type declaration optimization

In PHP8, stricter type declarations are introduced, which allows more optimization of the code during the compilation phase. For example, the following is an example of a type declaration:

<?php
function add(int $a, int $b): int {
    return $a + $b;
}

echo add(2, 3);

In this example, we explicitly specify that the parameter and return value are of type int. This eliminates the need for the PHP engine to perform additional type conversions, thereby improving code execution efficiency.

3. Attribute access optimization

In PHP8, the optimization of attribute access is introduced, which can access the properties of objects more efficiently. The following is a sample code:

<?php
class User {
    private $name;
    
    public function __construct(string $name) {
        $this->name = $name;
    }
    
    public function getName(): string {
        return $this->name;
    }
}

$user = new User("John");
echo "User name: " . $user->getName();

In this example, we define a private property name in the User class and initialize it through the constructor. The value of this attribute can be obtained through the $user->getName() method. In PHP8, for this simple attribute access, the PHP engine will directly generate the corresponding access code without additional parsing and calling, thus improving access efficiency.

Conclusion:

By optimizing underlying development technologies such as JIT compiler, type declaration and property access, PHP8 can significantly improve server performance. In actual web development, we can use these technologies to optimize bottleneck codes and improve the system's concurrent processing capabilities. Of course, this is only part of the technology in the underlying development of PHP8, and there are many other optimization strategies worth exploring.

Reference:

1. PHP: The Right Way - https://phptherightway.com/
2. PHP: Hypertext Preprocessor - http://php.net /
3. PHP7 vs PHP8 - What Are The New Features In PHP8? - https://stackify.com/php-8-new-features/
4. PHP: Just-In-Time Compiler - https://wiki.php.net/rfc/jit

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