I'm currently encountering an issue while working with PHP's PDO extension, and I'm hoping someone can help me out. I keep getting an error message that says "Only variables should be passed by reference" when I try to execute a PDO statement.
Here's the context: I am working on a web application that allows users to create and edit their profiles. To store and retrieve the user data, I'm using PDO with a MySQL database. Everything was working perfectly fine until I started adding some functionality to update the user's profile.
Here's a snippet of my code:
$stmt = $pdo->prepare("UPDATE users SET email = :email, username = :username WHERE id = :id");
The error is triggered at the `$stmt->execute();` line, and I'm not sure what I'm doing wrong. I have double-checked my code and made sure that all the variables (`$email`, `$username`, and `$id`) are properly defined before the execution.
I have tried searching on various forums and found some similar issues related to passing variables by reference in PDO. However, the solutions suggested didn't resolve my problem.
Any insights or suggestions on how to fix this issue would be greatly appreciated. Let me know if you need any additional information.
Thanks in advance!