PHP protocol_version() / mysqli_get_proto_info() 函数
示例 - 面向对象的样式
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();
?>
$mysqli = new mysqli("localhost","my_user","my_password","my_db");
if ($mysqli -> connect_errno) {
echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
exit();
}
echo $mysqli -> protocol_version;
$mysqli -> close();
?>
查看底部的程序样式示例。
定义和用法
mysqli_get_proto_info() 函数返回 MySQL 协议版本。
语法
面向对象的风格：
$mysqli ->
protocol_version
程序风格：
mysqli_get_proto_info(connection)
参数值
| 参数 | 描述 |
|---|---|
| connection | 必需。规定要使用的 MySQL 连接。 |
技术细节
| 返回值: | 返回一个表示 MySQL 协议版本的整数。 |
|---|---|
| PHP 版本: | 5+ |
示例 - 程序样式
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);
?>
$con = mysqli_connect("localhost","my_user","my_password","my_db");
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit();
}
echo mysqli_get_proto_info($con);
mysqli_close($con);
?>
