search
HomeBackend DevelopmentPHP Tutorial分不多了啊!PHP数据库查询,用户信息验证

PHP 数据库 MySQL

首先,上代码
$username=$_POST["name"];
$password=$_POST["password"];
if($username&&$password)
{
if(strpos($username," ")!==false)echo "用户名非法";
else
{
$con=mysql_connect("localhost","root","1");
mysql_select_db("manage",$con);
$sql="
select *
from user
where username='$username' and password='$password'
";
$query = mysql_query($sql) or die(mysql_error());
$row=mysql_num_rows($query);
/*
var_dump($sql);
exit;
*/

if($row==1)echo'登录成功';
  else
  echo '登录失败';
}
}
?>
不晓得为什么,我的$row执行后获取的值是0,但是呢,我用获取到的$sql

在数据库中执行后, 明明能查询到一条记录,所以能明确,SQL查询后的函数有问题,但是因为我没有什么书籍,还请大家指教。

回复讨论(解决方案)

推荐使用英文的用户名

字符编码对不上,mysql_query(set names utf8) 试试

字符编码对不上,mysql_query(set names utf8) 试试
回帖之前就搞定了,仁兄你说的对!

推荐使用英文的用户名
中国人的名字有几个是英文?

数据库是什么编码,查询前加上:mysql_query("set names utf8"); 试试看。

数据库是什么编码,查询前加上:mysql_query("set names utf8"); 试试看。
没错!


推荐使用英文的用户名
中国人的名字有几个是英文?
把账户名和他的名字分开,他的名字作为一个账户信息。
汉字容易遇到字符集编码的问题。

像mysql_query("set names utf8"); 这个处理漏掉了,你不要犯这样的低级错误。

字符编码对不上,mysql_query(set names utf8)

Statement
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
11 Best PHP URL Shortener Scripts (Free and Premium)11 Best PHP URL Shortener Scripts (Free and Premium)Mar 03, 2025 am 10:49 AM

Long URLs, often cluttered with keywords and tracking parameters, can deter visitors. A URL shortening script offers a solution, creating concise links ideal for social media and other platforms. These scripts are valuable for individual websites a

Introduction to the Instagram APIIntroduction to the Instagram APIMar 02, 2025 am 09:32 AM

Following its high-profile acquisition by Facebook in 2012, Instagram adopted two sets of APIs for third-party use. These are the Instagram Graph API and the Instagram Basic Display API.As a developer building an app that requires information from a

Working with Flash Session Data in LaravelWorking with Flash Session Data in LaravelMar 12, 2025 pm 05:08 PM

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-

Build a React App With a Laravel Back End: Part 2, ReactBuild a React App With a Laravel Back End: Part 2, ReactMar 04, 2025 am 09:33 AM

This is the second and final part of the series on building a React application with a Laravel back-end. In the first part of the series, we created a RESTful API using Laravel for a basic product-listing application. In this tutorial, we will be dev

Simplified HTTP Response Mocking in Laravel TestsSimplified HTTP Response Mocking in Laravel TestsMar 12, 2025 pm 05:09 PM

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' =>

cURL in PHP: How to Use the PHP cURL Extension in REST APIscURL in PHP: How to Use the PHP cURL Extension in REST APIsMar 14, 2025 am 11:42 AM

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.

12 Best PHP Chat Scripts on CodeCanyon12 Best PHP Chat Scripts on CodeCanyonMar 13, 2025 pm 12:08 PM

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

Announcement of 2025 PHP Situation SurveyAnnouncement of 2025 PHP Situation SurveyMar 03, 2025 pm 04:20 PM

The 2025 PHP Landscape Survey investigates current PHP development trends. It explores framework usage, deployment methods, and challenges, aiming to provide insights for developers and businesses. The survey anticipates growth in modern PHP versio

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),