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implementing PHP 8.1 and PDO Prepared Statements Causing SQLSTATE[HY093] scenarios

πŸ‘€ Views: 78 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-11
php pdo prepared-statements sqlstate PHP

I'm confused about This might be a silly question, but I'm experiencing an scenario when using prepared statements with PDO in PHP 8.1. I have a simple function that is supposed to insert a user record into the database, but I keep getting the behavior `SQLSTATE[HY093]: Invalid parameter number: parameter was not defined`. I've double-checked my SQL query and parameter bindings, but I need to seem to pinpoint the question. Here’s the relevant code snippet: ```php public function addUser($username, $email) { $stmt = $this->pdo->prepare("INSERT INTO users (username, email) VALUES (:username, :email)"); $stmt->execute([':username' => $username, ':email' => $email]); } ``` I’ve confirmed that the `$username` and `$email` variables are correctly set and not null before calling `addUser`. I also tried modifying the prepared statement to: ```php $stmt->execute(['username' => $username, 'email' => $email]); ``` This didn't help and resulted in the same behavior. I even turned on PDO behavior mode with: ```php $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); ``` To see if I could get more detailed behavior information, but the behavior remains the same. Additionally, I verified that my database connection is functioning correctly and that the table `users` exists with the columns `username` and `email`. I'm using MySQL 8.0 and I’ve also made sure that the PDO extension is properly installed and configured in my PHP setup. Is there something I'm missing here? Any insights or suggestions would be greatly appreciated! For context: I'm using Php on Linux. What am I doing wrong? I'm developing on Windows 10 with Php. What's the correct way to implement this?