PHP mysqli_get_host_info() 函数

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定义和用法

mysqli_get_host_info() 函数用于获取有关主机的信息，即使用的连接类型和主机服务器的名称。

语法

mysqli_get_host_info($con);

参数

返回值

PHP mysqli_get_host_info() 函数返回一个字符串，指定主机的名称和连接类型。

PHP 版本

此函数首次引入于 PHP 5 版本，并在所有后续版本中均有效。

示例

以下示例演示了 mysqli_get_host_info() 函数的用法（过程式风格）−

<?php
  //Creating a connection
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   //Host Info
   $info = mysqli_get_host_info($con);
   print("Host Info: ".$info);

   //Closing the connection
   mysqli_close($con);
?>

这将产生以下结果 −

Client Library Version: localhost via TCP/IP

示例

在面向对象风格中，此函数的语法为 $con->host_info。以下是此函数在面向对象风格中的示例 −

<?php
   //Creating a connection
   $con = new mysqli("localhost", "root", "password", "mydb");

   //Host Info
   $info = $con->host_info;
   print("Host Info: ".$info);

   //Closing the connection
   $con -> close();
?>

这将产生以下结果 −

Client Library Version: localhost via TCP/IP

示例

以下是 mysqli_get_host_info 函数的另一个示例 −

<?php
   //Creating a connection
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   $code = mysqli_connect_errno();
   if($code){
      print("Connection Failed: ".$code);
   }else{
      print("Connection Established Successfully"."\n");
      $info = mysqli_get_host_info($con);
      print("Host Info: ".$info);
   }
?>

这将产生以下结果 −

MySQL Server Version Number: localhost via TCP/IP

示例

<?php
   $connection_mysql = mysqli_connect("localhost","root","password","mydb");
   
   if (mysqli_connect_errno($connection_mysql)){
      echo "Failed to connect to MySQL: " . mysqli_connect_error();
   }
   echo mysqli_get_host_info($connection_mysql);   
   mysqli_close($connection_mysql);
?>

这将产生以下结果 −

localhost via TCP/IP