MySql binary connection mode and mysql binary connection
Connect using mysql binary
You can use the MySQL binary method to enter the mysql Command Prompt and connect to the MySQL database.
Instance
The following is a simple example of connecting to the mysql server from the command line:
Copy codeThe Code is as follows:
[Root @ host] # mysql-u root-p
Enter password :******
After successful logon, the mysql> Command Prompt window appears. You can execute any SQL statements on it.
After the preceding command is executed, the result of successful logon is as follows:
Welcome to the MySQL monitor. Commands end with; or \ g.
Your MySQL connection id is 2854760 to server version: 5.0.9
Type 'help; 'or' \ H' for help. Type '\ C' to clear the buffer.
In the above example, we use the root user to log on to the mysql server. Of course, you can also use other mysql users to log on.
If you have sufficient permissions, any user can perform SQL operations in the mysql Command Prompt window.
Exit mysql> the Command Prompt window can use the exit command, as shown below:
Copy codeThe Code is as follows:
Mysql> exit
Bye
Use a PHP script to connect to MySQL
PHP provides the mysql_connect () function to connect to the database.
The function has five parameters. After successfully linking to MySQL, the connection ID is returned. If the function fails, FALSE is returned.
Syntax
Copy codeThe Code is as follows:
Connection mysql_connect (server, user, passwd, new_link, client_flag );
Parameter description:
| Parameters | Description |
|---|---|
| Server | Optional. Specifies the server to be connected. It can include the port number, for example, "hostname: port", or the path to the local socket, for example, ":/path/to/socket" for localhost ". If the PHP Command mysql. default_host is not defined (the default value is true), the default value is 'localhost: 3306 '. |
| User | Optional. User name. The default value is the user name of the server process owner. |
| Passwd | Optional. Password. The default value is null. |
| New_link | Optional. If the same parameter is used to call mysql_connect () for the second time, a new connection is not established, but an opened connection ID is returned. The new_link parameter changes this behavior and makes mysql_connect () always open a new connection, even when mysql_connect () was previously called with the same parameter. |
| Client_flag | Optional. The client_flags parameter can be a combination of the following constants:
|
You can use the mysql_close () function of PHP to disconnect from the MySQL database.
This function only has one parameter that is the MySQL connection identifier returned after the mysql_connect () function is successfully created.
Syntax
bool mysql_close ( resource $link_identifier );
This function disables the non-persistent connection associated with the specified connection ID to the MySQL server. If link_identifier is not specified, the last opened connection is closed.
Note: you do not need to use mysql_close () because a non-persistent connection is automatically closed after the script is executed.
Note: mysql_close () does not close persistent connections established by mysql_pconnect.
Instance
You can try the following instances to connect to your MySQL Server:
<Html>The above is a detailed description of the MySql binary connection method introduced by the small Editor, hoping to help you!
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