Summary of content about php database interface technology
1. Which databases does PHP support (which database interfaces does it have)
Adabas D, InterBase, PostgreSQL, dBase, FrontBase, SQLite, Empress, mSQL, Solid, FilePro (read-only ), Direct MS-SQL, Sybase, Hyperwave, MySQL, Velocis, IBM DB2, ODBC, Unix dbm, informix, Oracle (OCI7 and OCI8), Ingres, Ovrimos
The above databases are supported. In short, Supports most mainstream databases
2, PHP native operation method of mysql database
<?php //数据库操作 //1.导入数据库 require("../../public/dbconfig.php"); //2.连接数据库 $link=mysql_connect(HOST,USER,PASS) or die("数据库连接失败"); //3.选择数据库,设置字符集 mysql_select_db(DBNAME,$link); mysql_set_charset("utf8"); //4.编写sql语句,发送sql语句到数据库 $sql="select * from users"; $res=mysql_query($sql,$link); //5.解析结果集 while($user=mysql_fetch_assoc($res)){ echo "<tr align='center'>"; echo "<td>{$userstate[$user['state']]}</td>"; echo "<td>{$user['username']}</td>"; echo "<td>".date("Y-m-d",$user['addtime'])."</td>"; echo "<td> <a href='edit.php?id={$user['id']}'>修改</a> <a href='action.php?a=del&id={$user['id']}'>删除</a> </td>"; echo "</tr>"; } mysql_free_result($res); mysql_close($link); ?>
3, PDO of PHP Concept
PDO is PHP data object. It operates data as an object, which improves the security and convenience of operating data. It is supported starting from PHP5.1 version, such as prepared statements ( prepared statements), bound parameters, scrollable cursors, positioned updates, and LOBs.
DAO (Data Access Object) Data Access Object is an object-oriented (PDO) database interface. In many PHP frameworks, a safe and convenient data processing interface method is formed by encapsulating the native PDO
<?php> //在advanced\common\config\main-local.php的conponents中配置好db; //连接数据库 $connection = Yii::$app->db; //编写预处理查询语句 $command = $connection->createCommand('SELECT * FROM post'); //执行操作 $posts = $command->queryAll(); $post = $command->queryOne(); $titles = $command->queryColumn(); <?php>
4. Active Record
ActiveRecord is a design pattern. Its direct purpose is not to operate the database, but a data model. Relative to DAO, it is a higher-level abstraction of data. It provides a unified object-oriented interface to access data in the database.
Use AR to simplify the code and reduce the possibility of errors. The following example is the AR operation method in YII
//数据表customer对象实例化 $customer = new Customer(); $customer->name = 'Qiang'; $customer->save(); // 一行新数据插入 customer 表
5. When to use DAO or ARComplex business logic uses DOA, otherwise use AR
The above is the detailed content of Summary of content about php database interface technology. 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

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

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



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

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,

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
