Question

Warning: mysqli_query() expects at least 2 parameters

<?php
$conn = mysql_connect('localhost','root','') or die("MYSQL_connect:".mysql_errno());
mysqli_query("set name gbk");
?>

请问哪里错了 请指正 谢谢大神 ~

Answer 1

mysqli_query($conn,"set name gbk");//少了个参数

Answer 2

1. 少了必须参数

   mysqli_query(connection,query,resultmode);

   

2. // 假定数据库用户名：root，密码：123456，数据库：RUNOOB $con=mysqli_connect("localhost","root","123456","RUNOOB"); 
   if (mysqli_connect_errno($con)) { 
       echo "连接 MySQL 失败: " . mysqli_connect_error(); 
   } 
    // 执行查询mysqli_query($con,"SELECT * FROM websites");mysqli_query($con,"INSERT INTO websites (name, url, alexa, country)
   VALUES ('百度','https://www.baidu.com/','4','CN')"); 
   mysqli_close($con);