PHP mysqli_get_server_info() 函式

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定義和用法

mysqli_get_server_info() 函式用於獲取已建立連線的 MySQL 伺服器的資訊（版本）。

語法

mysqli_get_server_info([$con]);

引數

返回值

PHP mysqli_get_server_info() 函式返回一個字串，表示 MySQLi 擴充套件連線到的 MySQL 伺服器的版本。

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_server_info() 函式的用法（過程式風格）−

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

   //MySQL Server version
   $version = mysqli_get_server_info($con);
   print("Client Library Version Number: ".$version);

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

這將產生以下結果 −

Client Library Version Number: 5.7.12-log

示例

在面向物件風格中，此函式的語法為 $con->client_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");

   //MySQL Server Version
   $version = $con->server_info;
   print("MySQL Server Version Number: ".$version);

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

這將產生以下結果 −

MySQL Server Version Number: 5.7.12-log

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");
      $info = mysqli_get_server_info($con);
      print("MySQL Server Version Number: ".$info);
   }
?>

這將產生以下結果 −

Connection Established Successfully
MySQL Server Version Number: 5.7.12-log

示例

<?php
   $connection_mysql = mysqli_connect("localhost", "user_name", "password", "database_name");
   
   if (mysqli_connect_errno($connection_mysql)){
      print("Failed to connect to MySQL: ".mysqli_connect_error());
   }
   print(mysqli_get_server_info($connection_mysql));
   
   mysqli_close($connection_mysql);
?>

這將產生以下結果 −

5.7.12-log