MySQLi
PHP Manual

mysqli->protocol_version

mysqli_get_proto_info

(PHP 5)

mysqli->protocol_version -- mysqli_get_proto_infoReturns the version of the MySQL protocol used

说明

面向对象风格

string $protocol_version;

过程化风格

int mysqli::mysqli_get_proto_info ( mysqli $link )

Returns an integer representing the MySQL protocol version used by the connection represented by the link parameter.

参数

link

仅以过程化样式:由 mysqli_connect()mysqli_init() 返回的链接标识。

返回值

Returns an integer representing the protocol version.

范例

Example #1 mysqli->protocol_version example

面向对象风格

<?php
$mysqli 
= new mysqli("localhost""my_user""my_password");

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

/* print protocol version */
printf("Protocol version: %d\n"$mysqli->protocol_version);

/* close connection */
$mysqli->close();
?>

过程化风格

<?php
$link 
mysqli_connect("localhost""my_user""my_password");

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

/* print protocol version */
printf("Protocol version: %d\n"mysqli_get_proto_info($link));

/* close connection */
mysqli_close($link);
?>

以上例程会输出:

Protocol version: 10

参见


MySQLi
PHP Manual