How to improve the access speed of PHP website by reducing duplicate code?-PHP Tutorial-php.cn

How to improve the access speed of PHP website by reducing duplicate code?

王林

Release： 2023-08-06 12:56:01

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How to improve the access speed of PHP website by reducing duplicate code?

With the rapid development of the Internet, access speed has become one of the important indicators to measure the quality of a website. For websites developed using PHP, reducing duplicate code is one of the effective ways to improve access speed. This article will introduce how to improve the access speed of PHP websites by reducing repeated code, and give corresponding code examples.

Use functions to encapsulate duplicate code
Duplicate code is one of the main manifestations of code redundancy. By encapsulating repeated code into functions, the amount of code can be reduced and the readability and maintainability of the code can be improved. At the same time, some logical judgments can be added inside the function to make the function suitable for different scenarios. The following is an example:

function getUserInfo($userId) {
    // 获取用户信息的代码
}

// 调用函数
$userInfo1 = getUserInfo(1);
$userInfo2 = getUserInfo(2);

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Use include and require to introduce duplicate code
In PHP, duplicate code can be introduced into the main program through the include and require statements. In this way, the repeated code can be stored in a file and can be directly included or required when needed. The following is an example:

// common.php
function checkLogin() {
    // 检查用户是否登录的代码
}

// index.php
include 'common.php';
checkLogin();
// 其他代码

// admin.php
include 'common.php';
checkLogin();
// 其他代码

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Using caching technology
In PHP development, caching is an important means to improve access speed. By caching the results of repeated calculations, you can avoid repeatedly executing the same code and save computing resources. There are many caching technologies to choose from in PHP, such as using Memcached or Redis to cache database query results, and using file cache or memory cache to cache other calculation results. The following is an example:

// 查询数据库的代码
$sql = "SELECT * FROM user WHERE id = ?";
$userId = 1;
$result = $cache->get('user_' . $userId);
if (!$result) {
    $stmt = $pdo->prepare($sql);
    $stmt->execute([$userId]);
    $result = $stmt->fetch(PDO::FETCH_ASSOC);
    $cache->set('user_' . $userId, $result, 3600); // 缓存结果1小时
}

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Use template engine
When developing a PHP website, using a template engine can separate the display logic and business logic of the page and reduce the occurrence of duplicate codes. Through the template engine, you can store the page layout and style and other related codes in a template file, and just include it directly when you need to use it. The following is an example:

// template.php
<html>
<head>
    <title><?= $pageTitle ?></title>
</head>
<body>
    <div id="header">
        <?= $headerContent ?>
    </div>
    <div id="content">
        <?= $pageContent ?>
    </div>
    <div id="footer">
        <?= $footerContent ?>
    </div>
</body>
</html>

// index.php
$pageTitle = "首页";
$headerContent = "头部内容";
$pageContent = "页面内容";
$footerContent = "底部内容";

include 'template.php';

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Through the above methods, we can effectively reduce duplicate codes and improve the access speed of PHP websites. Of course, in addition to reducing duplicate code, there are other optimization strategies, such as using appropriate database indexes, optimizing SQL queries, etc., which can also play a certain role in improving the access speed of the website. I hope this article will be helpful to improve the access speed of PHP website!

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