mysql_get_proto_info

Function name: mysql_get_proto_info()

Applicable version: PHP 4, PHP 5, PHP 7

Function Description: The mysql_get_proto_info() function is used to get the current connection's MySQL server protocol version.

usage:

 int mysql_get_proto_info ( void )

Parameters: This function does not accept any parameters.

Return value: Returns an integer representing the current connected MySQL server protocol version.

Example:

 $conn = mysql_connect("localhost", "username", "password"); if (!$conn) { die("连接数据库失败：" . mysql_error()); } $proto_info = mysql_get_proto_info(); echo "MySQL 服务器协议版本：" . $proto_info; mysql_close($conn);

In the above example, we first use the mysql_connect() function to connect to the MySQL database. Then, use the mysql_get_proto_info() function to get the currently connected MySQL server protocol version and store it in the $proto_info variable. Finally, use echo to output protocol version information.

Please note that mysql_get_proto_info() function has been deprecated after PHP 5.5.0, and it is recommended to use mysqli_get_proto_info() function instead.