警告：mysqli_query（）至少需要2个参数，

Question

Receive 3 Warnings: mysqli_query() for function create_tb(), first  parameters are "CREATE TABLE session id()" and "CREATE TABLE user()" on lines 151 and 170 haven't a clue what the second would be? 

还有线170上的mysqli_error（）？

错误

Warning: mysqli_query() expects at least 2 parameters, 1 given in C:\line 151 

警告：mysqli_query（）预计至少2个参数，1在C中给出：\线170 警告：mysqli_error（）期望的是1个参数，0在C中给出：\线170

enter code here 

function create_tb() 
{ 
// This function creates all the nessesary tables for database 
global $db_link, $host_name, $db_user,$db_password, 
$html_header, $html_footer, $db_name, $table_ads; 
$sql_query1=sql_create_tb(); 
$db_link = mysqli_connect($host_name, $db_user, $db_password); 
mysqli_query($db_link, $sql_query1);      

mysqli_query (" 
CREATE TABLE session_id (
id int(10) unsigned NOT NULL auto_increment, 
cookie varchar(255) NOT NULL default '', 
user_id int(10) NOT NULL default '0', 
last_request int(10) NOT NULL default '0', 
PRIMARY KEY (id), 
UNIQUE KEY id (id) 
)");              //line 151 

mysqli_query (" 
CREATE TABLE user (
id int(10) unsigned NOT NULL auto_increment, 
user_name text NOT NULL, 
email text NOT NULL, 
passwd text NOT NULL, 
tel text NOT NULL, 
fax text NOT NULL, 
city text NOT NULL, 
state text NOT NULL, 
ip text NOT NULL, 
category text NOT NULL, 
lastup_date int(10) NOT NULL default '0', 
member_date int(10) NOT NULL default '0', 
PRIMARY KEY (id), 
UNIQUE KEY id (id) 
)") or die (mysqli_error());        //line 170 

Answer 1

您必须给db连接标识符作为第一个参数。例如：

Answer 2

的错误是很明确的：你需要2个参数： - 连接标识符 - 查询。

E.g：

mysqli_query ($db_link, " 
CREATE TABLE session_id (
id int(10) unsigned NOT NULL auto_increment, 
cookie varchar(255) NOT NULL default '', 
user_id int(10) NOT NULL default '0', 
last_request int(10) NOT NULL default '0', 
PRIMARY KEY (id), 
UNIQUE KEY id (id) 
)"); 

没有第一参数和mysqli函数不知道要使用哪个数据库，使其显示您在上面