一个从MYSQL取数据,在前台显示的问题
数据 mysql 服务器 图片
想上传图片到服务器,用MYSQL存地址,有1000来张图片,随机找几张在前台显示.自己实在写不出来,怎么个思路啊?网上搜也知道要搜什么关键词,那位大神帮帮忙?
回复讨论(解决方案)
简单的随机一个数就行。也是最好的办法。 你要全部随机那就用IN
我觉得可以在程序里面随机几个数,然后带入mysql去查询。
思路,先在后台做个upload上传,然后把图片路径存到数据库里,前台直接调取就可以了。
1.首先你图片上传应该会吧!不会看这个视屏教程(http://www.php100.com/html/shipinjiaocheng/PHP100shipinjiaocheng/2009/0416/808.htm)
2.图片地址入数据库,不会一样去看教程
3.随机取几张图片,比如12张,sql可以这么写:
select * from `表` order by rand() limit 12
1.首先你图片上传应该会吧!不会看这个视屏教程(http://www.php100.com/html/shipinjiaocheng/PHP100shipinjiaocheng/2009/0416/808.htm)
2.图片地址入数据库,不会一样去看教程
3.随机取几张图片,比如12张,sql可以这么写:
select * from `表` order by rand() limit 12
404错误,还有别的教程吗?
php文件上传
http://www.w3school.com.cn/php/php_file_upload.asp
mysql的查询语句 是支持随机查询的 http://www.3lian.com/edu/2013/03-01/58619.html
如果对查询速率没什么要求,建议使用order by rand() ,因为比较简单

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

AI Hentai Generator
Generate AI Hentai for free.

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



Alipay PHP...

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,

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

Article discusses essential security features in frameworks to protect against vulnerabilities, including input validation, authentication, and regular updates.

The article discusses adding custom functionality to frameworks, focusing on understanding architecture, identifying extension points, and best practices for integration and debugging.

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

An official introduction to the non-blocking feature of ReactPHP in-depth interpretation of ReactPHP's non-blocking feature has aroused many developers' questions: "ReactPHPisnon-blockingbydefault...
