php读取两个数据表的问题
我用的一个程序 它把推荐内容的ID都放在一个推荐表里 我想调用一个推荐类型的内容 怎么调不出来,请高手指点。
$result=mysql_query("SELECT * FROM `推荐表` where tj_id=1 limit 0,12");
while($row=mysql_fetch_array($result)){
?>
$aid = $row[tj_id];
$result1=mysql_query("SELECT * FROM `内容表` where id=aid ");//where id=aid 这里aid直接改成数字可以出来,应该是上一行取不到结果
while($row=mysql_fetch_array($result1)){
?>
=$row[title]?>
}
?>
}
?>
回复讨论(解决方案)
print_r($row); 看看
$aid = $row[tj_id];
如果是“上一行取不到结果”,那么根本就执行不到那里
$aid = $row[tj_id];=>$aid = $row['th_id']如果取值不到,那你仔细看下。
$aid = $row[tj_id];
$result1=mysql_query("SELECT * FROM `内容表` where id=1 ");//也就是说这样可以输出
while($row=mysql_fetch_array($result1)){
?>
$aid = $row[tj_id];
$result1=mysql_query("SELECT * FROM `内容表` where id=aid ");//楼主这里的aid是不是应该换成$aid呢?你这样写的意思不是说要查 id=字符串为aid的行吗?
aid改成$aid,你这个是变量呀,又不是字符

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...
