$list=$m->query($sql);//查询结果 $columns=$this->getcolumns($tableName); //模型列名 foreach ($list as $l) { foreach ($columns as $c) { $l[$c];//数据读不出来 } }
如以上 从数据库把所有列都出来 然后动态 根据列名动态取数据取不出来
回复讨论(解决方案)
因为要 返回json 表列有点多 一个个写有点复杂 所以找了个取列明的方法
然而不能动态读取数据么
你
print_r($list);
print_r($columns);
看看都有什么
你
print_r($list);
print_r($columns);
看看都有什么
好像发现一个问题
$l['user_name'] 能显示数据 $l['USER_NAME'] 换了大小写就不显示了 php数组区分大小写么
数据库里是大写查询出来的 读的时候都用小写?
对!php数组区分大小写
$a = array('a' => 1, 'A' => 2);print_r($a);
Array( [a] => 1 [A] => 2)
由于数据库查询时,字段名可能大小写不统一
所以你可对读到的数组用 array_change_key_case 函数统一将关联键转换成大写或小写
由于数据库查询时,字段名可能大小写不统一
所以你可对读到的数组用 array_change_key_case 函数统一将关联键转换成大写或小写
知道了 多谢
由于数据库查询时,字段名可能大小写不统一
所以你可对读到的数组用 array_change_key_case 函数统一将关联键转换成大写或小写
$list=array_change_key_case($list,CASE_UPPER);foreach ($list as $l) { foreach ($columns as $c) { $l['USER_NAME'];// }}
转换后读的时候好像还是大写读不出 只能小写读数据
既然你是 foreach ($list as $l)
那么显然 $list 是二维数组,不然也不会有 foreach ($list as $l)
所以要对 $l 做 array_change_key_case
foreach ($list as $l)
{
$l = array_change_key_case($l, CASE_UPPER);
foreach ($columns as $c)
{
echo $l[$c];
}
}
既然你是 foreach ($list as $l)
那么显然 $list 是二维数组,不然也不会有 foreach ($list as $l)
所以要对 $l 做 array_change_key_case
}
了解了

Laravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-

The PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.

Laravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>

Do you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom

Laravel's service container and service providers are fundamental to its architecture. This article explores service containers, details service provider creation, registration, and demonstrates practical usage with examples. We'll begin with an ove

PHP logging is essential for monitoring and debugging web applications, as well as capturing critical events, errors, and runtime behavior. It provides valuable insights into system performance, helps identify issues, and supports faster troubleshoot

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

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


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

Zend Studio 13.0.1
Powerful PHP integrated development environment

SublimeText3 English version
Recommended: Win version, supports code prompts!

Dreamweaver Mac version
Visual web development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools