PHP mysqli_get_host_info() 函式

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定義和用法

mysqli_get_host_info() 函式用於獲取有關主機的資訊，即使用的連線型別和主機伺服器的名稱。

語法

mysqli_get_host_info($con);

引數

返回值

PHP mysqli_get_host_info() 函式返回一個字串，指定主機的名稱和連線型別。

PHP 版本

此函式首次引入於 PHP 5 版本，並在所有後續版本中均有效。

示例

以下示例演示了 mysqli_get_host_info() 函式的用法（過程式風格）−

<?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);
?>

這將產生以下結果 −

Client Library Version: localhost via TCP/IP

示例

在面向物件風格中，此函式的語法為 $con->host_info。以下是此函式在面向物件風格中的示例 −

<?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();
?>

這將產生以下結果 −

Client Library Version: localhost via TCP/IP

示例

以下是 mysqli_get_host_info 函式的另一個示例 −

<?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);
   }
?>

這將產生以下結果 −

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);
?>

這將產生以下結果 −

localhost via TCP/IP