mysql_connect有效，mysqli没有

Question

像魅力一样：

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

这两个都因内部服务器错误（500）而失败

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

Answer 1

您错过了i

中的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');

查看constructor

的手册