👀 Views: 1870 💬 Answers: 1 📅 Created: 2025-07-22

php pdo prepared-statements PHP

I've been struggling with this for a few days now and could really use some help. I'm sure I'm missing something obvious here, but I'm experiencing an scenario with PDO prepared statements in PHP 8.1 where binding parameters seems to behave inconsistently when executing multiple queries in a loop. Here's a simplified version of my code: ```php $dsn = 'mysql:host=localhost;dbname=testdb'; $username = 'root'; $password = ''; try { $pdo = new PDO($dsn, $username, $password); $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); } catch (PDOException $e) { echo 'Connection failed: ' . $e->getMessage(); } $users = [ ['name' => 'John Doe', 'email' => 'john@example.com'], ['name' => 'Jane Smith', 'email' => 'jane@example.com'], ]; $sql = 'INSERT INTO users (name, email) VALUES (:name, :email)'; $stmt = $pdo->prepare($sql); foreach ($users as $user) { $stmt->bindParam(':name', $user['name']); $stmt->bindParam(':email', $user['email']); if (!$stmt->execute()) { echo "behavior inserting user: " . implode(', ', $stmt->errorInfo()); } } ``` When I run this code, I get an behavior message on the second iteration stating that the values for the parameters are not being updated correctly. The first user 'John Doe' is inserted without any issues, but the second user insertion throws an behavior about the email value being `NULL`. I have tried using `bindValue()` instead of `bindParam()`, but the scenario continues. I also ensured that the array keys are correct and that they contain valid values. Is there a known scenario with parameter binding in PDO in PHP 8.1 that could cause this behavior? Any insights or workarounds would be greatly appreciated. This is part of a larger service I'm building. Has anyone else encountered this? The stack includes Php and several other technologies.