👀 Views: 77 💬 Answers: 1 📅 Created: 2025-06-20

php pdo mysql sql PHP

I'm deploying to production and This might be a silly question, but I'm working on a project and hit a roadblock... I'm currently working on a PHP 8.1 application, where I'm trying to execute a MySQL query that uses both `GROUP BY` and `HAVING` clauses. The query is intended to fetch users who have a minimum number of posts in a specific category. However, I'm working with an scenario where the query returns an empty result set, despite there being matching records in the database. The code I'm using looks like this: ```php $categoryId = 2; $minPosts = 5; $stmt = $pdo->prepare( 'SELECT users.id, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE posts.category_id = :category_id GROUP BY users.id HAVING post_count > :min_posts' ); $stmt->bindParam(':category_id', $categoryId, PDO::PARAM_INT); $stmt->bindParam(':min_posts', $minPosts, PDO::PARAM_INT); $stmt->execute(); $results = $stmt->fetchAll(PDO::FETCH_ASSOC); ``` When I execute the above code, I expect to see an array of users with their corresponding post counts, but the result is always empty. I've checked the database, and there are indeed users who have posted in category 2 and have more than 5 posts. I've also tried running the raw SQL query directly in MySQL Workbench and it works fine, returning the expected results. I suspect there might be an scenario with how I'm binding the parameters or the query structure when executed in PDO. I've attempted using different parameter types, but the results remain the same. Any insights on what might be causing this scenario or how I can debug it further? Is there a better approach? I'm working on a CLI tool that needs to handle this. I appreciate any insights! My team is using Php for this mobile app. Could this be a known issue?