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Introduction to PHP8: To understand what this new version of PHP is, specific code examples are required
PHP (Hypertext Preprocessor) is a script widely used in web development language. Since its birth in 1995, PHP has continued to develop and evolve, providing developers with more powerful features and tools. PHP8 is the latest version of PHP, released on November 26, 2020. This article will introduce some of the new features of PHP8 and provide specific code examples to help readers better understand this new version.
<?php // 开启JIT编译器 opcache_compile_file("example.php"); // 然后执行编译后的代码 include "example.php"; ?>
<?php $value = 3; $result = match($value) { 1 => "One", 2 => "Two", 3 => "Three", default => "Unknown" }; echo $result; // 输出:Three ?>
<?php class User { public ?string $name; } $user = new User(); $user->name = "John Doe"; $length = $user->name?->length(); echo $length; // 输出:8 ?>
<?php function greet(string $name): string { return "Hello, " . $name; } echo greet("John Doe"); // 输出:Hello, John Doe ?>
Summary:
Through the introduction and code examples of this article, readers can have a preliminary understanding of the new features and improvements of PHP8, including JIT compiler, matching expressions, null safety operators, and new types Statement etc. These new features can not only improve the operating efficiency of PHP, but also make developers' codes more concise, readable and maintainable. Both novice and experienced developers can benefit from it and better utilize the power of PHP8 for web development.
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