PHP development tips: How to implement fast search
PHP Development Tips: How to Implement Fast Search
Introduction:
In many Web applications, the search function is an essential part. Whether it is for e-commerce websites, news websites or social media platforms, fast and efficient search functions can greatly improve user experience. This article will introduce some PHP development skills to help you implement fast search functions.
1. Use full-text indexing technology
MySQL provides full-text indexing function, which can improve search efficiency. First, make sure your version of MySQL supports full-text indexing. Then, create a full-text index on the table fields that need to be searched. For example, we have a table named products, which contains a field name, we can create a full-text index using the following command:
ALTER TABLE products ADD FULLTEXT(name);
Next, we can use The MATCH() and AGAINST() functions search on the full-text index. For example, if we want to search for products containing the keyword 手机, we can use the following query statement:
SELECT * FROM products WHERE MATCH (name) AGAINST ('手机'); 2. Using caching technology
The search function usually faces a problem, that is, the search results The amount of data is large, and each search requires querying the database. In this case, using caching technology will greatly improve the search speed. You can use a cache server such as Memcached or Redis to store search results and reduce the number of queries to the database.
The following is a sample code that uses Memcached to cache search results:
$keyword = $_GET['keyword'];
$memcached = new Memcached();
$memcached->addServer('localhost', 11211);
$result = $memcached->get('search_' . $keyword);
if ($result) {
echo '搜索结果来自缓存：<br>';
foreach ($result as $item) {
echo $item['name'] . '<br>';
}
} else {
// 从数据库中查询搜索结果
$sql = "SELECT * FROM products WHERE name LIKE '%" . $keyword . "%'";
$result = $db->query($sql);
$arr = [];
if ($result->num_rows > 0) {
while ($row = $result->fetch_assoc()) {
$arr[] = $row;
}
$memcached->set('search_' . $keyword, $arr, 3600); // 缓存结果一小时
echo '搜索结果来自数据库：<br>';
foreach ($arr as $item) {
echo $item['name'] . '<br>';
}
} else {
echo '抱歉，没有找到相关结果。';
}
}3. Use AJAX to implement real-time search
In order to improve the user experience of search, you can use AJAX technology to implement real-time search. When the user types a keyword in the search box, the front-end JavaScript sends an AJAX request to the back-end, the back-end returns the matching search results, and then the front-end displays the search results to the user. The following is a real-time search sample code implemented using jQuery and PHP:
<!DOCTYPE html>
<html>
<head>
<title>实时搜索</title>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
$(document).ready(function () {
$("#keyword").keyup(function () {
var keyword = $(this).val();
$.ajax({
url: "search.php",
type: "POST",
data: {keyword: keyword},
success: function (data) {
$("#result").html(data);
}
});
});
});
</script>
</head>
<body>
<input type="text" id="keyword" placeholder="请输入关键词">
<div id="result"></div>
</body>
</html>// search.php
$keyword = $_POST['keyword'];
$sql = "SELECT * FROM products WHERE name LIKE '%" . $keyword . "%'";
$result = $db->query($sql);
if ($result->num_rows > 0) {
while ($row = $result->fetch_assoc()) {
echo $row['name'] . '<br>';
}
} else {
echo '抱歉，没有找到相关结果。';
}Summary:
When developing the search function of a web application, the use of full-text indexing, caching, AJAX and other technologies can greatly improve the search efficiency Speed and user experience. I hope the PHP development skills introduced in this article can be helpful to you.
The above is the detailed content of PHP development tips: How to implement fast search. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1385
52
Alipay PHP SDK transfer error: How to solve the problem of 'Cannot declare class SignData'?
Apr 01, 2025 am 07:21 AM
Alipay PHP...
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
Describe the SOLID principles and how they apply to PHP development.
Apr 03, 2025 am 12:04 AM
The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.
How to automatically set permissions of unixsocket after system restart?
Mar 31, 2025 pm 11:54 PM
How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...
Explain the concept of late static binding in PHP.
Mar 21, 2025 pm 01:33 PM
Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo
How to send a POST request containing JSON data using PHP's cURL library?
Apr 01, 2025 pm 03:12 PM
Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...
Framework Security Features: Protecting against vulnerabilities.
Mar 28, 2025 pm 05:11 PM
Article discusses essential security features in frameworks to protect against vulnerabilities, including input validation, authentication, and regular updates.
Customizing/Extending Frameworks: How to add custom functionality.
Mar 28, 2025 pm 05:12 PM
The article discusses adding custom functionality to frameworks, focusing on understanding architecture, identifying extension points, and best practices for integration and debugging.
