Backend Development
PHP Tutorial
PHP example analyzes the usage skills of mysql transaction processing
PHP example analyzes the usage skills of mysql transaction processing
This article mainly introduces PHP examples and analyzes the usage skills of mysql transaction processing. Interested friends can refer to it. I hope it will be helpful to everyone.
The example of this article describes the method of PHP Mysql implementing the transfer function based on transaction processing, as follows:
<?php
header("Content-Type:text/html;charset=utf-8");
$mysqli=new mysqli("localhost","root","","test");
if(mysqli_connect_errno())
{
printf("连接失败:%s<br>",mysqli_connect_error());
exit();
}
$success=TRUE;
$price=8000;
$result=$mysqli->query("select cash from account where name='userA'");
while($row=$result->fetch_assoc())
{
$value=$row["cash"];
echo $value;
}
$mysqli->autocommit(0);
if($value>=$price){
$result=$mysqli->query("UPDATE account set cash=cash-$price where name='userA'");
}else {
echo '余额不足';
exit();
}
if(!$result or $mysqli->affected_rows!=1)
{
$success=FALSE;
}
$result=$mysqli->query("UPDATE account set cash=cash+$price where name='userB'");
if(!result or $mysqli->affected_rows!=1){
$success=FALSE;
}
if($success)
{
$mysqli->commit();
echo '转账成功!';
}else
{
$mysqli->rollback();
echo "转账失败!";
}
$mysqli->autocommit(1);
$query="select cash from account where name=?";
$stmt=$mysqli->prepare($query);
$stmt->bind_param('s',$name);
$name='userA';
$stmt->execute();
$stmt->store_result();
$stmt->bind_result($cash);
while($stmt->fetch())
echo "用户userA的值为：".$cash;
$mysqli->close();
?>The database SQL statement is as follows:
create table account{
userID smallint unsigned not null auto_increment,
name varchar(45) not null,
cash decimal(9,2) not null,
primary key(userID)
)type=InnoDB;
insert into account(name,cash) values ('userA','2000');
insert into account(name,cash) values ('userB','10000');Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.
Related recommendations:
Detailed graphic explanation of parameters and data filtering in php
Cache classification database in php Cache
php file upload management system
The above is the detailed content of PHP example analyzes the usage skills of mysql transaction processing. 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 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.
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's Purpose: Building Dynamic Websites
Apr 15, 2025 am 12:18 AM
PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.
How to connect to the database of apache
Apr 13, 2025 pm 01:03 PM
Apache connects to a database requires the following steps: Install the database driver. Configure the web.xml file to create a connection pool. Create a JDBC data source and specify the connection settings. Use the JDBC API to access the database from Java code, including getting connections, creating statements, binding parameters, executing queries or updates, and processing results.
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 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 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.
PHP: Handling Databases and Server-Side Logic
Apr 15, 2025 am 12:15 AM
PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.
