老声长谈,着是困惑很多人的问题,如果处理不好,都是乱码,说这些话并不是我对编码很精通,只是在这方面是得留神,自己总结了一点小经验(容易出现乱码的地方有php文件里面 ,数据库里面 存储 的编码 ,页面显示 ,数据传输 ):
1.在建数据库的时候,尤其是用phpMyAdmin与MYSQL打交道时候,一般都是utf-8,字段为 utf8_general_ci
数据库的设置:
在my.ini文件中查找:
[mysql]
default-character-set = utf8
[mysqld]
default-character-set = utf8
init_connect = 'SET NAMES utf8 '
全部设置为utf8
保存,重新启动mysql服务
2.在与数据打交道的时候mysql_query("set names 'utf8'");注意是:utf8,不是 utf-8
3.PHP的文件默认的编码是ANSI ,需要转换为UTF-8 ,至于怎么转换editplus就有这样的功能,“另存为”的时候有选择编码UTF-8 ,注意:不能选择:UTF-8 + BOM,如果选择这个了 ,你在处理session的时候就会出现问题,所以一定要注意.还有有的人在eclipse,Myeclipse,ZendStudio里面开发,eclipse里面默认的是ISO-8859-1,需要在“窗口 ”->“首选项 ”打开“首选项”窗口,在左侧“常规 ”->“工作空间 ”,在“文本文件编码 ”里面设置默认的编码为utf-8
4.就是PHP文件里面要说明:如
或者
复制代码 代码如下:
5.还有就是处理中文等双字节的时候也有可能出现乱码,PHP里面可以采用的有iconv,mb_convert_encoding来处理双字节,其余的可以参考PHP帮助手册
6.在补充一点(遗漏的一点),在你的程序里面你要知道数据之间的传递也有可能存在编码问题的,但是你又不知道传递过来的数据是采用的什么编码,在PHP里面提供了方法来处理的,下面是自己写的一个简单方法,可以参考一下
复制代码 代码如下:
//编码转换
function display_fileencoding($filename)
{
if(extension_loaded("mbstring"))
{
$code=mb_detect_encoding($filename);//检测字符串编码
$filename=mb_convert_encoding($filename,"UTF-8",$code);//将编码$code转换为utf-8编码
return $filename;
}
else
die("请检查系统是否正确安装配置mbstring");
}
要确保mbstring在你的php.ini中启用
7.保证以上几处编码一致就可以了!!数据库,网页输出都不会出现乱码了,如有不对的,请留言指出!!

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.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

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 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.


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