这篇文章主要介绍了php+mysqli使用面向对象方式查询数据库的方法,实例分析了mysqli对象的创建、连接、查询及返回结果、释放资源等技巧,需要的朋友可以参考下
本文实例讲述了php+mysqli使用面向对象方式查询数据库的方法。分享给大家供大家参考。具体实现方法如下:
connect_error){//connect_error为属性,报错
die("数据库连接失败:".$mysqli->connect_errno."--".$mysqli->connect_error);
// connect_errno:错误编号
}
$mysqli->select_db("liuyan");//选择数据库
$mysqli->query("set names 'GBK'");
//第二步:数据库查询,代码如下
$sql = "select title,contents from news limit 5,5";
//第三步:执行,显示结果
$res = $mysqli->query($sql) or die($mysqli->error);
// 返回值 $res 为资源类型(获取到结果的资源类型)
if($res){
while($row = $res->fetch_assoc()){
//注意:fetch_assoc()为 MySQLi_Result 里的函数,详情见手册
echo "标题:".$row['title']."
内容:".$row['contents']."
"; } } //第四步,释放结果集,,关闭连接 $res->free(); $mysqli->close(); ?>
希望本文所述对大家的php程序设计有所帮助。

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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

WebStorm Mac version
Useful JavaScript development tools

Atom editor mac version download
The most popular open source editor

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software