的mysql_connect工作，mysqli的不

Question

就像一个魅力：

mysql_connect('localhost') or die('Could not connect to MySQL database'); 
mysql_select_db('k') or die('Couldnt select MySQL database in connect.php'); 

这两个失败，内部服务器错误（500）

$mysqli = new mysql('localhost',null,null,'k'); 
$mysqli = new mysql('localhost','','','k'); 

Answer 1

你缺少i在mysqli

$mysqli = new mysql('localhost',null,null,'k'); 
$mysqli = new mysql('localhost','','','k'); 

应该是

$mysqli = new mysqli('localhost',null,null,'k'); 
$mysqli = new mysqli('localhost','','','k'); 

Answer 2

它应该是new mysqli(..，而不是new mysql(..：

$mysqli = new mysqli('localhost',null,null,'k'); 
$mysqli = new mysqli('localhost','','','k'); 

检查constructor