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Q:

Undefined variable: con in C:\xampp\htdocs\CRUD\login.php on line 14

I am experiencing an issue with my login functionality in my CRUD (Create, Read, Update, Delete) application and would appreciate some assistance. When trying to access my login.php file, I'm encountering an error message stating "Undefined variable: con in C:\xampp\htdocs\CRUD\login.php on line 14". I'm not sure how to address this problem. Can anyone help me understand what this error means and how I can resolve it?

Any help would be greatly appreciated. Thank you in advance!

All Replies

okeefe.george

User 1: Hi there! I've encountered a similar error in the past, and I might be able to help you out. The "Undefined variable: con" error typically occurs when you try to use a variable that has not been declared or assigned a value.

In this case, it seems like the variable "con" is not being defined before you're trying to use it on line 14 of your login.php file. One common reason for this error is forgetting to establish a database connection before using it in your code.

Make sure you have correctly defined and initialized the variable "con" as your database connection object before using it in your login process. Double-check any relevant statements or functions responsible for establishing database connections, such as mysqli_connect() or PDO.

If you could provide the relevant code snippet from your login.php file, it would be easier for us to assist you further. Additionally, check for any typos or naming inconsistencies that may prevent the variable "con" from being recognized.

I hope this helps! Let me know if you have any more details or if you need further assistance troubleshooting this issue.

jordan.pacocha

User 2: Hey there! I've encountered the "Undefined variable: con" error before, and I understand how frustrating it can be. This error typically occurs when you're trying to use a variable that has not been declared or initialized in your code.

In your case, it seems like the variable "con" is being used on line 14 of your login.php file without being defined earlier. One possible reason for this error is forgetting to include the file where you establish the database connection or failing to initialize the "con" variable within that file.

To resolve this issue, ensure that you have properly included the file where you establish the database connection in your login.php file. Additionally, confirm that the variable "con" is being initialized with the database connection object before the line where the error occurs.

If you could share a snippet of your code, specifically the parts related to database connection and the line causing the error, we can assist you better. Also, don't forget to double-check for any spelling mistakes or inconsistencies in the variable name "con."

Feel free to provide more information, and I'll be happy to help you further with troubleshooting this error!

rempel.estefania

User 3: Hi everyone! I've faced this "Undefined variable: con" error in the past, and I'd like to share my experience with you. This error typically occurs when you're working with a variable that hasn't been defined or is out of scope.

In your case, specifically in the login.php file, it seems like the variable "con" is not recognized on line 14. This often happens when you forget to declare or assign a value to the "con" variable before using it at that point in the code.

To fix this error, you'll need to ensure that you have properly initialized the "con" variable before line 14. Check the surrounding code or function where the "con" variable should be defined. Make sure that you're not unintentionally overriding or reassigning it with a different value before reaching line 14.

Another possibility is that you might be trying to access a variable from a different scope or function without passing it along or making it accessible through a global keyword. In that case, you should review the structure of your code and ensure that the variable "con" is accessible where you're trying to use it.

If you can provide us with the relevant portion of your login.php code, including the lines around line 14, we can investigate further. Identifying any potential mistakes or oversights will be easier with additional context.

Feel free to share more details or ask any follow-up questions, and I'll be glad to assist you in resolving this issue!

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