Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > 怎么解决ＰＨＰ错误

怎么解决ＰＨＰ错误

WBOY
Release： 2016-06-23 14:18:14
Original
903 people have browsed it

登录界面




管理员登录








用户名
密　码




 //接收errno
 if(!empty($_GET['errno'])){
 $errno=$_GET['errno'];
 if($errno==1){
    echo "你的用户名或密码错误";
 }
}
?>


处理界面


浏览器错误信息

回复讨论(解决方案)

$sql = "select password from admin wherename= '$userName'";

注意引号。

$sql = "select password from admin wherename= '$userName'";

注意引号。
谢谢了，在数据库中变量不是不用单引号的吗？为什么$userName要呢

你外边用了双引号  就算里边用单引号也没有问题了,变量依然可以被解析,反之则不行.

mysql里边 字符串要用引号(单双均可)否则会语法错误.

字符串都是需要加引号的

Related labels：
怎么解决ＰＨＰ错误
source：php.cn
Previous article：在浏览器输入一个网址，返回的数据，如何赋值给一个自己定义的变量？ Next article：如何查看一个网站首页是index.htm还是index.php 不用试的方法.或者有哪个浏览器可以直接显示的？
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
There is an error with npx create-react-app command, how do I fix it? I've been trying to create a new React app using the 'npxcreate-react-app' command but it ...
From 2024-04-05 14:42:18
0
1
3511
How to solve the problem of creating a React application? [closed] Actually I added npxcreate-react-appmy-app so while creating my React app I got an error i...
From 2024-04-05 12:46:17
0
1
412
How to configure apache to load index.html and index.php? Here is my doubt, I have the following structure: root/index.html root/api/index.php I hav...
From 2024-04-05 09:27:53
0
1
3505
MySQL operation to get maximum sum function I'm trying to set the maximum quantity to "max" and I'm getting the error: Error...
From 2024-04-04 17:49:26
0
1
376
Solve the error that mysql result contains multiple lines When I execute this query I get this error message "Error code: 1172. The result cont...
From 2024-04-04 16:42:59
0
1
311
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template