如何将我的页面连接到数据库[重复]

Question

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• “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP 28 answers

i am trying to do registration page so when the user fill the fields, the information should go to the database but it keeps showing me this:

Notice: Undefined variable: sql in C:\xampp\htdocs\Bawazir\Untitled-1.php on line 92

SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES)

here is the code :

Notice: Undefined variable: sql in C:\xampp\htdocs\Bawazir\Untitled-1.php on line 92

SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES)

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Answer 1

"Notice: Undefined variable: sql ... " means that you are trying to use a variable that doesn't exist or is not defined at that moment.

Try defining the $sql variable at the beginning of the file where your database connection is.