(PHP 5, PHP 7, PHP 8)
mysqli::$protocol_version -- mysqli_get_proto_info — 返回MySQL使用的協(xié)議版本號
面向對象風(fēng)格
過(guò)程化風(fēng)格
返回一個(gè)整數，表述 被link參數所表述的連接 所使用的MySQL協(xié)議的版本號.
返回一個(gè)整數來(lái)表述協(xié)議的版本號.
示例 #1 $mysqli->protocol_version example
面向對象風(fēng)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();
?>
過(guò)程化風(fēng)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);
?>
以上例程會(huì )輸出：
Protocol version: 10