How to implement the functions of the previous and next articles in PHP (code)-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

How to implement the functions of the previous and next articles in PHP (code)

不言

Aug 21, 2018 pm 03:57 PM

native php

The content of this article is about how PHP implements the functions (code) of the previous and next articles. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Take some time every day to summarize.

In actual PHP development, publishing news or articles generally involves the functions of the previous article and the next article. When doing this function, the first thing that comes to mind is, how to implement it in one step? What I will think about is, how to get the ID of the previous article and the ID of the next article? After some thinking, I thought of it. The ideas for solving the problem are as follows:

1. Connect to the database.

2. Get the id of the previous or next article through the limit statement

3. Use the if statement to determine the previous article, then get the smallest id and compare it with it. The current ids are equal. Next article, vice versa. . .

4. $rsQ = mysql_fetch_object($resultQ); //It is an array of objects. Get a row from the result set (record set) as an object, and use the data returned by the json interface to get each parameter.

<?php
                    require_once  &#39;conn.php&#39;; // 连接数据库
                   //上一篇文章 
                   $id = $_GET[&#39;id&#39;];  // id 为每一篇文章的id
                    $sqlQ = "select * from 表名 where id < $id order by id desc limit 0,1"; // 取出上一篇的id小于当前的id
                    // 查询数据获取id的最小值
                    $Sqlmin="select id from 表名 where id=(select min(id) from 表名)";
                    $resultmin = mysql_query($Sqlmin);
                    // 获取Sqlmin中的某一个字段
                    $rowQ  = mysql_fetch_assoc($resultmin);
 
                    $resultQ = mysql_query($sqlQ) or die(&#39;错误：&#39;.mysql_error());
                    $rsQ = mysql_fetch_object($resultQ);  // 结果集（记录集）中取得一行作为对象。
                      
                    if ($id == $rowQ[&#39;id&#39;]) { 
                        $idQ = &#39;&#39;; 
                        $rsQtitle = &#39;&#39;; // 上一篇的标题
                    }
                    else{
                        $idQ = $rsQ->id; // stdClass Object里面每个参数的值 , 利用json接口返回的数据
                         $rsQtitle = $rsQ->title; // 上一篇的标题
                    }
                    //下一篇文章 
                    $sqlH = "select * from lujiaoxiang_addarticle where id > $id order by id asc limit 0,1"; 
                     
                    // 查询数据获取id的最大值
                    $Sqlmax="select id from lujiaoxiang_addarticle where id=(select max(id) from lujiaoxiang_addarticle)";
                    $resultmax = mysql_query($Sqlmax);
                    $rowH  = mysql_fetch_assoc($resultmax);
                    $resultH = mysql_query($sqlH) or die(&#39;错误：&#39;.mysql_error());
                    $rsH = mysql_fetch_object($resultH);
                   
                    if ($id == $rowH[&#39;id&#39;]) {
                        $idH = &#39;&#39;; 
                        $rsHtitle = &#39;&#39;;
                    }
                    else{
                        $idH = $rsH->id; // stdClass Object里面每个参数的值 , 利用json接口返回的数据   
                        $rsHtitle = $rsH->title; // 下一篇的标题
                    } 
                    ?>

Copy after login

The final effect is as shown below:

##Related recommendations:

php implementation File upload and download methods (code)

Code implementation of WeChat authorized login under TP5 framework

The above is the detailed content of How to implement the functions of the previous and next articles in PHP (code). For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

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

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Roblox: Grow A Garden - Complete Mutation Guide

4 weeks ago By DDD

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys

4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Nordhold: Fusion System, Explained

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook

4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Clair Obscur: Expedition 33 - How To Get Perfect Chroma Catalysts

2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

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

Java Tutorial

1677

CakePHP Tutorial

1430

Laravel Tutorial

1333

PHP Tutorial

1278

C# Tutorial

1257

Related knowledge

Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1? Apr 17, 2025 am 12:06 AM

In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

How does PHP type hinting work, including scalar types, return types, union types, and nullable types? Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

PHP and Python: Different Paradigms Explained Apr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

Choosing Between PHP and Python: A Guide Apr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Python: A Deep Dive into Their History Apr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP and Frameworks: Modernizing the Language Apr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

Why Use PHP? Advantages and Benefits Explained Apr 16, 2025 am 12:16 AM

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

PHP's Impact: Web Development and Beyond Apr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

See all articles