Detailed explanation of examples of implementing database paging and multi-condition query functions in PHP-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

Detailed explanation of examples of implementing database paging and multi-condition query functions in PHP

巴扎黑

Sep 07, 2017 pm 01:45 PM

php database Query function

The following editor will bring you an example of using PHP to access the database to realize the paging function and multi-condition query function. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor and take a look.

1. Implement the paging function

<body>
<table width="100%" border="1">
 <thead>
 <tr>
  <th>代号</th>
  <th>名称</th>
  <th>价格</th>
 </tr>
 </thead>
 <tbody>
  <?php
 require_once "./DBDA.class.php";　　//加载数据库访问类的封装文件
 require_once "page.class.php";　　//加载分页类的封装文件
 $db = new DBDA();
 $sql = "select count(*) from car";
 $arr = $db->query($szts);
  
 $page = new Page($arr[0][0],5);　　//查看总数据，并每页显示的行数据
 $sql = "select * from car".$page->limit;　　//拼接每页显示的数据
 $arr = $db->query($sql);
 foreach($arr as $v){
  echo "<tr>
  <td>{$v[0]}</td>
  <td>{$v[1]}</td>
  <td>{$v[2]}</td>
 </tr>";
 }
 ?> 
 </tbody>
</table>
 
<p style="margin-top:20px">
 <?php
 echo $page->fpage();　　//调用分页类的方法
 ?>
</p>
</body>

Copy after login

2. Implement multi-condition query function

<body>
<?php
require_once "./DBDA.class.php";
require_once "page.class.php";
$db = new DBDA();
 
//做一个恒成立的条件
$tj = " 1=1 ";
$tj2 = " 1=1 ";
$name = " ";
$brand = " ";
//当提交的数据不为空，需要改条件
if(!empty($_GET["name"])){
 $name = $_GET["name"];
 $tj = " name like &#39;%{$name}%&#39; ";　　//使用模糊查询查询关键信息
}
if(!empty($_GET["brand"])){
 $brand = $_GET["brand"];
 $tj2 = " brand = &#39;{$brand}&#39; ";
}
 
?>
<table width="100%" border="1">
<form action="test.php" method="get">
 <input type="text" name="name" placeholder="请输入名称" value="<?php echo $name ?>" style="max-width:200px; float:left">
 <input type="text" name="brand" placeholder="请输入系列" value="<?php echo $brand ?>" style="max-width:200px; float:left">
 <button type="submit" style="float:left; margin-left:10px">查询</button>
 </form>
 <thead>
 <tr>
  <th>代号</th>
  <th>名称</th>
  <th>系列</th>
  <th>时间</th>
  <th>价格</th>
 </tr>
 </thead>
 <tbody>
  <?php
 $zts = "select count(*) from car where {$tj} and {$tj2}";　　//多条件查询数据总数
 $ats = $db->query($arr);
 $page = new Page($ats[0][0],2);
  
 $sql = "select * from car where {$tj} and {$tj2} ".$page->limit;
 $arr = $db->query($sql);
 foreach($arr as $v){
  //给查询的关键字加字体颜色
  $n = str_replace($name,"<span style=&#39;color:red&#39;>{$name}</span>",$v[1]);  
  echo "<tr>
  <td>{$v[0]}</td>
  <td>{$n}</td>
  <td>{$v[2]}</td>
  <td>{$v[3]}</td>
  <td>{$v[7]}</td>
 </tr>";
 }
 ?> 
 </tbody>
</table>
<p>
<?php
echo $page->fpage();
?>
</p>
</body>

Copy after login

The above is the detailed content of Detailed explanation of examples of implementing database paging and multi-condition query functions in PHP. 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

How to fix KB5055523 fails to install in Windows 11?

3 weeks ago By DDD

How to fix KB5055518 fails to install in Windows 10?

3 weeks ago By DDD

Roblox: Dead Rails - How To Tame Wolves

1 months ago By DDD

Strength Levels for Every Enemy & Monster in R.E.P.O.

4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Roblox: Grow A Garden - Complete Mutation Guide

2 weeks ago By DDD

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

1662

CakePHP Tutorial

1418

Laravel Tutorial

1311

PHP Tutorial

1261

C# Tutorial

1234

Related knowledge

PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP in Action: Real-World Examples and Applications Apr 14, 2025 am 12:19 AM

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP vs. Python: Understanding the Differences Apr 11, 2025 am 12:15 AM

PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP vs. Other Languages: A Comparison Apr 13, 2025 am 12:19 AM

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

The Enduring Relevance of PHP: Is It Still Alive? Apr 14, 2025 am 12:12 AM

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP and Python: Code Examples and Comparison Apr 15, 2025 am 12:07 AM

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP vs. Python: Core Features and Functionality Apr 13, 2025 am 12:16 AM

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

See all articles