Why Can't My Login Form Connect to My MySQL Database?

The question, "Unable to connect my login form to mySQL database," presents an issue with the connection between a login form and a MySQL database. However, the suggested answer focuses on password hashing and SQL injection avoidance using mysqli and pdo for PHP, which diverges from the original question.

Analyzing the Problem:

The original question provides PHP code for both the login form and the login logic but does not mention password hashing or SQL injection prevention. It appears the user is experiencing an issue connecting to the database and handling login functionality.

Addressing the Original Problem:

To address the issue, consider the following:

1. Check Database Connection:

   • Ensure that the provided hostname, username, password, and database name are correct in the PHP code.
   • Verify the existence of the MySQL database and the user's permissions.

2. Examine Login Logic:

   • Check if the username and password entered into the form match those stored in the database.
   • Use prepared statements to avoid SQL injection vulnerabilities.

3. Handling Errors:

   • Implement error handling to provide meaningful messages when login fails.

Additional Considerations:

1. Password Hashing:

   • It is recommended to store passwords in a hashed form to prevent plaintext storage in the database. Password hashing is not directly related to the issue.

2. SQL Injection Prevention:

   • Always use prepared statements or parameterized queries to prevent SQL injection attacks. This is addressed using bind parameters in the provided answer but is outside the scope of the original question.

Recommended Resource:

• PHP Manual on Prepared Statements: https://www.php.net/manual/en/mysqli.prepare.php

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