Mysql5 writing and reading garbled code solution_PHP tutorial
The example I wrote
require("adodb/adodb.inc.php" );
$conn=newadoconnection('mysql');
$conn->connect("localhost","root","2027205","bh38") or die("Connection failed") ;
$conn->execute("set names gb2312");
$conn->execute("INSERT INTO `vv` (`cc`) VALUES ('I don’t know if it will work if I change the encoding ');") or die("Error");
$rc=$conn->execute("select * from vv");
while(!$rc->EOF)
{
echo($rc->fields["cc"]);
$rc->movenext();
}
?>
Of course we do too You can modify the character set of the database through the following command
alter database da_name default character set 'charset'.
The client sends it in gbk format, and you can use the following configuration:
SET character_set_client='gbk'
SET character_set_connection='gbk'
SET character_set_results='gbk'
This configuration is equivalent to SET NAMES 'gbk'.
Now operate the database just created
mysql> use test;
Database changed
mysql> insert into mysqlcode values(null,'php enthusiast');
ERROR 1406 (22001) : Data too long for column 'content' at row 1
The character set is not specified as gbk, an error occurred during insertion
mysql> set names 'gbk';
Query OK, 0 rows affected (0.02 sec)
The specified character set is gbk
mysql> insert into mysqlcode values(null,'php lovers');
Query OK, 1 row affected (0.00 sec)
Insertion successful
mysql> select * from mysqlcode;
+----+-----------+
| id | content |
+----+-------- ---+
| 1 | php hobby |
+----+-----------+
1 row in set (0.00 sec)
In When the character set gbk is not specified, garbled characters will appear when reading, as follows
mysql> select * from mysqlcode;
+----+---------+
| id | content |
+----+---------+
| 1 | php??? |
+----+---------+
1 row in set (0.00 sec)

PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.

Fibers was introduced in PHP8.1, improving concurrent processing capabilities. 1) Fibers is a lightweight concurrency model similar to coroutines. 2) They allow developers to manually control the execution flow of tasks and are suitable for handling I/O-intensive tasks. 3) Using Fibers can write more efficient and responsive code.

The PHP community provides rich resources and support to help developers grow. 1) Resources include official documentation, tutorials, blogs and open source projects such as Laravel and Symfony. 2) Support can be obtained through StackOverflow, Reddit and Slack channels. 3) Development trends can be learned by following RFC. 4) Integration into the community can be achieved through active participation, contribution to code and learning sharing.

PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP is not dying, but constantly adapting and evolving. 1) PHP has undergone multiple version iterations since 1994 to adapt to new technology trends. 2) It is currently widely used in e-commerce, content management systems and other fields. 3) PHP8 introduces JIT compiler and other functions to improve performance and modernization. 4) Use OPcache and follow PSR-12 standards to optimize performance and code quality.

The future of PHP will be achieved by adapting to new technology trends and introducing innovative features: 1) Adapting to cloud computing, containerization and microservice architectures, supporting Docker and Kubernetes; 2) introducing JIT compilers and enumeration types to improve performance and data processing efficiency; 3) Continuously optimize performance and promote best practices.


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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Notepad++7.3.1
Easy-to-use and free code editor

Dreamweaver Mac version
Visual web development tools

SublimeText3 Linux new version
SublimeText3 Linux latest version