How to use PHP's own function library DEBUG? (code example)
本篇文章给大家带来的内容是关于PHP自带函数库DEBUG如何使用?(代码示例),有一定的参考价值,有需要的朋友可以参考一下,希望对你有所帮助。
在建立数据库时,不知道为什么用以下代码建立不出来,也不知道为什么,其中conn.php是连接Mysql数据库的文件
include ("conn.php"); $sql1 = "CREATE DATABASE zhygl"; $result1 = mysqli_query($conn, $sql1); //创建zhygl数据库; mysqli_select_db($conn, "zhygl"); $sql2 = "CREATE TABLE user_info( id int AUTO_INCREMENT NOT NULL, user_id varchar(50), nick_name varchar(30), gender tinyint(1), city varchar(30), province varchar(30), country varchar(30), if_approve tinyint(1), ticket_num int, place_num int )";
然后我再利用mysqli_erro()函数查错,
if ($result2) { echo "success!"; }else { trigger_error(mysqli_error($conn),E_USER_ERROR); }
注意,mysqli_erro()函数接受一个参数就是你链接的那个数据库
Fatal error: Incorrect table definition; there can be only one auto column and it must be defined as a key in D:\WAMP\Web1\123.php on line 26
最后在HTML文件显示出以上错误,debug结束,修改相关语法即可
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