Instances of linked database wrapper classes
<?php class DBDA { public $host="localhost"; public $uid="root"; public $pwd="root"; public $dbname="db_0808"; /** *给一个sql语句,返回执行的结果 *@param string $sql 用户指定的sql语句 *@param int $type 用户给的语句类型,0代表增删改,1代表查询 *@return 返回查询的结果,如果是查询返回二维数组,如果是增删改返回true或false */ function Query($sql,$type=1) { //造连接对象 $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname); //执行sql语句 $reslut = $db->query($sql); if(!$reslut){ die($db->error); } //从结果集对象里面取数据 if($type==1) { return $reslut->fetch_all(); } else { return $reslut; } } /** *给一个sql语句,返回关联的二维数组 *@param string $sql 用户指定的sql语句 *@param int $type 用户给的语句类型,0代表增删改,1代表查询 *@return 返回查询的结果,如果是查询返回二维数组,如果是增删改返回true或false */ function GuanQuery($sql,$type=1) { //造连接对象 $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname); //执行sql语句 $reslut = $db->query($sql); //取数据 if($type==1) { $attr = array(); while($a = $reslut->fetch_assoc()) { $attr[] = $a; } return $attr; } else { return $reslut; } } /** *给一个sql语句,返回字符串 *@param string $sql 用户指定的sql语句 *@param int $type 用户给的语句类型,0代表增删改,1代表查询 *@return 返回查询的结果,如果是查询返回字符串,如果是增删改返回true或false */ function StrQuery($sql,$type=1) { //造连接对象 $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname); //执行sql语句 $reslut = $db->query($sql); //取数据 if($type==1) { $attr = $reslut->fetch_all(); $str=""; foreach($attr as $v) { $str .= implode("^",$v); $str .="|"; } return substr($str,0,strlen($str)-1); } else { return $reslut; } } }
The above is the detailed content of Instances of linked database wrapper classes. 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



According to news from this site on April 17, TrendForce recently released a report, believing that demand for Nvidia's new Blackwell platform products is bullish, and is expected to drive TSMC's total CoWoS packaging production capacity to increase by more than 150% in 2024. NVIDIA Blackwell's new platform products include B-series GPUs and GB200 accelerator cards integrating NVIDIA's own GraceArm CPU. TrendForce confirms that the supply chain is currently very optimistic about GB200. It is estimated that shipments in 2025 are expected to exceed one million units, accounting for 40-50% of Nvidia's high-end GPUs. Nvidia plans to deliver products such as GB200 and B100 in the second half of the year, but upstream wafer packaging must further adopt more complex products.

Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps

Hibernate polymorphic mapping can map inherited classes to the database and provides the following mapping types: joined-subclass: Create a separate table for the subclass, including all columns of the parent class. table-per-class: Create a separate table for subclasses, containing only subclass-specific columns. union-subclass: similar to joined-subclass, but the parent class table unions all subclass columns.

How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())

This website reported on July 9 that the AMD Zen5 architecture "Strix" series processors will have two packaging solutions. The smaller StrixPoint will use the FP8 package, while the StrixHalo will use the FP11 package. Source: videocardz source @Olrak29_ The latest revelation is that StrixHalo’s FP11 package size is 37.5mm*45mm (1687 square millimeters), which is the same as the LGA-1700 package size of Intel’s AlderLake and RaptorLake CPUs. AMD’s latest Phoenix APU uses an FP8 packaging solution with a size of 25*40mm, which means that StrixHalo’s F

To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.

HTML cannot read the database directly, but it can be achieved through JavaScript and AJAX. The steps include establishing a database connection, sending a query, processing the response, and updating the page. This article provides a practical example of using JavaScript, AJAX and PHP to read data from a MySQL database, showing how to dynamically display query results in an HTML page. This example uses XMLHttpRequest to establish a database connection, send a query and process the response, thereby filling data into page elements and realizing the function of HTML reading the database.

By encapsulating code, C++ functions can improve GUI development efficiency: Code encapsulation: Functions group code into independent units, making the code easier to understand and maintain. Reusability: Functions create common functionality that can be reused across applications, reducing duplication and errors. Concise code: Encapsulated code makes the main logic concise and easy to read and debug.
