PHP与Mysql的连接
呼,搞了足足两天零12个小时05分17秒,恍然大悟,原来我把数据库的名字写错了,导致这两天零12个小05分17秒的时间,都在迷惘中度过,不过现在算是解决了,所来特来发下心得体会。 忠告:写程序切记马虎,不细仔,真是写程序的大忌中的大忌。所以以后写代码务
呼,搞了足足两天零12个小时05分17秒,恍然大悟,原来我把数据库的名字写错了,导致这两天零12个小05分17秒的时间,都在迷惘中度过,不过现在算是解决了,所来特来发下心得体会。
忠告:写程序切记马虎,不细仔,真是写程序的大忌中的大忌。所以以后写代码务必:细心仔细不骄不燥,才能写出来好代码来,避免迷惘。。
繁写:
echo "This is a test";
echo "asdfasdfadsf";
$mysql_server_name="localhost"; //数据库服务器名称
$mysql_username="root"; // 连接数据库用户名
$mysql_password="??????"; // 连接数据库密码
$mysql_database="??????"; // 数据库的名字
// 连接到数据库
$conn=mysql_connect($mysql_server_name, $mysql_username,
$mysql_password);
// 从表中提取信息的sql语句
$strsql="SELECT * FROM `gbook`";
// 执行sql查询
$result=mysql_db_query($mysql_database, $strsql, $conn);
// 获取查询结果
$row=mysql_fetch_row($result);
echo '';
echo '';
";
// 显示字段名称
echo ""; ";
for ($i=0; $i
echo ''. ";
mysql_field_name($result, $i);
echo "
}
echo "
// 定位到第一条记录
mysql_data_seek($result, 0);
// 循环取出记录
while ($row=mysql_fetch_row($result))
{
echo ""; ";
for ($i=0; $i
echo ''; ';
echo $row[$i];
echo '
}
echo "
}
echo "
echo "";
// 释放资源
mysql_free_result($result);
// 关闭连接
mysql_close($conn);
?>
简写:
$conn=mysql_connect("localhost", "root", "password");
$result=mysql_db_query("Database", "SELECT * FROM `info`", $conn);
// 获取查询结果
$row=mysql_fetch_row($result);
echo '';
echo '';
";
// 显示字段名称
echo ""; ";
for ($i=0; $i
echo ''. ";
mysql_field_name($result, $i);
echo "
}
echo "
// 定位到第一条记录
mysql_data_seek($result, 0);
// 循环取出记录
while ($row=mysql_fetch_row($result))
{
echo ""; ";
for ($i=0; $i
echo ''; ';
echo $row[$i];
echo '
}
echo "
}
echo "
echo "";
// 释放资源
mysql_free_result($result);
// 关闭连接
mysql_close($conn);
?>
echo出来的主要是表格

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

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



PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.
