PHP-我在这段代码中遇到错误。错误说，警告：mysqli_query（）预计参数1是mysqli的，在

Question

$q = "SELECT CONCAT" (lname ', ', fname) AS name 
DATE_FORMAT(registration_date, %M %d, %Y) AS regdat FROM users 
ORDER BY registration_date DESC;   
$result = @mysqli_query ($dbcon $q); 

Answer 1

空给你有没有在报价错误：

$q = "SELECT CONCAT(lname, ', ', fname) AS name, 
      DATE_FORMAT(registration_date, '%M %d, %Y') AS regdat 
     FROM users 
     ORDER BY registration_date DESC"; 
$result = mysqli_query ($dbcon, $q);