(PHP 5)
mysqli::$protocol_version -- mysqli_get_proto_info — Returns the version of the MySQL protocol used
面向对象风格
过程化风格
Returns an integer representing the MySQL protocol version used by the
connection represented by the link parameter.
Returns an integer representing the protocol version.
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