get_proto_info

定义和用法

mysqli_get_proto_info() 函数返回 MySQL 协议版本。

实例

例子 1 - 面向对象风格

返回 MySQL 协议版本：

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

if ($mysqli -> connect_errno) {
  echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
  exit();
}

echo $mysqli -> protocol_version;

$mysqli -> close();
?>

例子 2 - 过程式风格

返回 MySQL 协议版本：

<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");

if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  exit();
}

echo mysqli_get_proto_info($con);

mysqli_close($con);
?>

语法

面向对象风格：

$mysqli -> protocol_version

过程式风格：

mysqli_get_proto_info(connection)