可能重复:
Can anyone help me figure out the meaning of this php error message?
以下是代码:
$con = mysql_connect("localhost", "root", '');
if (!$con)
{
die('Cannot make a connection');
}
mysql_select_db('yumbox_table', $con) or die('Cannot make a connection');
$user_name = mysql_real_escape_string($_POST['user_name']);
$password = mysql_real_escape_string($_POST['password']);
$user_type = mysql_real_escape_string($_POST['user_type']);
$data = mysql_query("SELECT * from users where user_name == '$user_name' AND password == '$password' user_type == '$user_type'") or die(mysql_error());
$info = mysql_fetch_array($data);
$count = mysql_numrows($data);
if ($count==1)
{
echo ("Success!!");
}
else
{
echo ("BIG FRIGGIN FAILURE!!");
}
mysql_close($con);
这些是从所述代码生成的错误消息:
Notice: Undefined index: user_name in C:\wamp\www\login.php on line 12
Call Stack
# Time Memory Function Location
1 0.0013 371904 {main}( ) ..\login.php:0
( ! ) Notice: Undefined index: password in C:\wamp\www\login.php on line 13
Call Stack
# Time Memory Function Location
1 0.0013 371904 {main}( ) ..\login.php:0
( ! ) Notice: Undefined index: user_type in C:\wamp\www\login.php on line 14
Call Stack
# Time Memory Function Location
1 0.0013 371904 {main}( ) ..\login.php:0
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '== '' AND password == '' user_type == ''' at line 1
答案 0 :(得分:0)
Undefined index
消息=
,而不是==
。它应该是SELECT * from users where user_name = '$user_name' AND password = '$password' AND user_type == '$user_type'"
=
列之前的user_type
。 答案 1 :(得分:0)
不确定此部分的错误。
$data = mysql_query("SELECT * from users where user_name == '$user_name' AND password == '$password' user_type == '$user_type'") or die(mysql_error());
尝试使用此
$data = mysql_query("SELECT * from users where user_name == '".$user_name."' AND password == '".$password."' user_type == '".$user_type."'") or die(mysql_error());