dongqing4070 2016-10-04 15:48
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php数据库连接错误[关闭]

I am trying to connect my PHP code to my sql backend, and I am coming across and error saying "Warning: mysqli_query() expects parameter 1 to be mysqli, string given in - on line 23 Error querying database."

I am following this guide. https://coolestguidesontheplanet.com/how-to-connect-to-a-mysql-database-with-php/

$link = mysqli_init();
$success = mysqli_real_connect(
   $link, 
   $host,
   $user, 
   $password, 
   $db,
   $port,
   $socket
) or die("error");


$query = "select * from Account_data";
mysqli_query($db, $query) or die('Error querying database.');

The first section(up to mysqli_querry) of the code works. However the syntax of the lines appears to be correct compared to the guide.

Any ideas?

Thanks in advance.

  • 写回答

1条回答 默认 最新

  • dsy48837 2016-10-04 15:52
    关注

    As the documentation indicates, in procedural style, the first parameter must be of type mysqli. That is:

    $link = mysqli_init();
    $success = mysqli_real_connect(
       $link, 
       $host,
       $user, 
       $password, 
       $db,
       $port,
       $socket
    ) or die("error");
    
    
    $query = "select * from Account_data";
    mysqli_query($link, $query) or die('Error querying database.');
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

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