


PHP PDO inserts a piece of data, and the solution to the situation where two pieces of data appear repeatedly
The content of this article is the solution to the situation where PHP PDO inserts a piece of data and two data appear repeatedly. It has a certain reference value. Now I share it with everyone. Friends in need can refer to it
$dsn = sprintf("mysql:host=%s;dbname=%s;charset=utf8", $host, $dbName);$_dbHandle = new PDO($dsn, $user, $password, $option); $sql = "insert into `name` (`age`) values (18)";
$_dbHandle-><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold;">exec</span>($sql);
非常简单的sql插入,但是每次执行的时候会出现两条一模一样的数据, 在我的环境下就出现问题,在别人的环境里就没有问题,于是我怀疑是环境问题。 页面刷新的时候根本看不出重复刷新的样子,但实际上真的执行了两条,只是看不出来。 因为我当时在编写rewrite规则,nginx没有给我报任何问题,但是我只操作了这里,所以认定是rewrite的问题。 具体原因如下: 由于nginx的重写问题(rewrite)的时候,在location的模块中,错误的语法,导致了项目被重复执行了两次,因为是nginx的重写跳转问题, 在nginx层面就进行跳转了,还不等响应数据,就已经跳转了,所以我们在断点调试的时候无法检验出这个问题。 如果遇到同样的场景,可以根据实际情况尝试把rewrite文件删除,或者修改来测试是否为nginx的问题。注:apache没有测过,但是也有可能也会有类似的情况。
The above is the detailed content of PHP PDO inserts a piece of data, and the solution to the situation where two pieces of data appear repeatedly. 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

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

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

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,

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

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

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.
