从mysql转换mysqli错误

Question

我想将我的MySQL代码转换为MYSQLI，但它在第21行发生错误。我无法确定我必须纠正第21行错误。谁能帮帮我吗？

$conn = mysqli_connect($host,$username,$password) or die(mysqli_error()); 
mysqli_select_db($conn,$dbname) or die(mysqli_error()); 
mysqli_set_charset($conn , "utf8"); 






mysqli_query($conn,"CREATE TABLE IF NOT EXISTS `cookies` (
`ip` varchar(32) NOT NULL DEFAULT '', 
`time` varchar(32) DEFAULT NULL, 
`waktu` varchar(255) DEFAULT NULL, 
PRIMARY KEY (`ip`) 
ENGINE=MyISAM DEFAULT CHARSET=utf8; 
) 
"); 

Answer 1

您的mysqli_error应该有一个参数。 mysqli_error($connection)

编辑代码在这里：

$conn = mysqli_connect($host,$username,$password); 
mysqli_select_db($conn,$dbname) or die(mysqli_error($conn)); 
mysqli_set_charset($conn , "utf8"); 

mysqli_query($conn,"CREATE TABLE IF NOT EXISTS `cookies` (
     `ip` varchar(32) NOT NULL DEFAULT '', 
     `time` varchar(32) DEFAULT NULL, 
     `waktu` varchar(255) DEFAULT NULL, 
     PRIMARY KEY (`ip`) 
     ENGINE=MyISAM DEFAULT CHARSET=utf8; 
     ) 
");