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Unexpected NULL return from mysqli_fetch_assoc() in PHP 8.1 after successful query execution

👀 Views: 184 💬 Answers: 1 📅 Created: 2025-06-13
php mysqli database mysql PHP

I'm confused about I'm optimizing some code but I've been working on this all day and I'm relatively new to this, so bear with me. I'm working with an scenario where `mysqli_fetch_assoc()` is returning NULL even after a successful query execution that I know should return results. I'm using PHP 8.1 and a MySQL database. Here is a snippet of my code: ```php $mysqli = new mysqli('localhost', 'user', 'password', 'database'); if ($mysqli->connect_error) { die('Connect behavior (' . $mysqli->connect_errno . ') ' . $mysqli->connect_error); } $query = "SELECT * FROM users WHERE active = 1"; $result = $mysqli->query($query); if (!$result) { die('Query behavior: ' . $mysqli->behavior); } // This returns NULL unexpectedly while ($row = mysqli_fetch_assoc($result)) { print_r($row); } ``` When I run the script, I check for errors and see no issues with the connection or the query execution. In fact, the query executes successfully and there are active users in the database. However, `mysqli_fetch_assoc()` just returns NULL. I've tried debugging by checking the value of `$result`, and it shows that it contains a valid result set. The `$result->num_rows` also confirms that there are rows to fetch. I even tried adding `mysqli_data_seek($result, 0);` before the `while` loop to reset the pointer, but that didn’t help either. I’ve also verified that there are no syntax errors in my SQL query. Could there be an scenario with how I'm using the mysqli extension in PHP 8.1, or is there something I'm missing in my configuration? Any insights would be greatly appreciated! Is there a better approach? Any ideas how to fix this? This is for a REST API running on Ubuntu 20.04. What's the best practice here? My team is using Php for this CLI tool. Thanks for taking the time to read this!