PHP 8.2 - how to to Retrieve Nested JSON Data from MySQL Using json_extract() and PDO
I'm testing a new approach and I'm maintaining legacy code that I've searched everywhere and can't find a clear answer..... I'm having trouble retrieving nested JSON data from a MySQL 8.0 database using PDO in PHP 8.2. My table has a column named `data` which stores JSON objects, and I'm trying to extract a specific nested value using the `JSON_EXTRACT()` function. However, the result is always returning `NULL`. Here's a simplified version of my query and how I'm executing it: ```php $dsn = 'mysql:host=localhost;dbname=mydb'; $username = 'user'; $password = 'password'; try { $pdo = new PDO($dsn, $username, $password); $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); } catch (PDOException $e) { echo "Connection failed: " . $e->getMessage(); } $sql = "SELECT JSON_EXTRACT(data, '$.user.details.address') as address FROM users WHERE id = :id"; $stmt = $pdo->prepare($sql); $stmt->bindValue(':id', 1, PDO::PARAM_INT); $stmt->execute(); $result = $stmt->fetch(PDO::FETCH_ASSOC); var_dump($result); ``` The JSON stored in the `data` column looks like this: ```json {"user": {"details": {"address": "123 Main St"}}} ``` When I execute the above code, the output is: ``` array(1) { ["address"]=> NULL } ``` I've verified that the JSON structure in the database is correct. I've also tried using single quotes `'` around the JSON path in `JSON_EXTRACT()` and am using the correct syntax. I believe the scenario might be related to how the JSON is being processed or returned by PDO. Has anyone experienced a similar scenario or have suggestions on how to debug this further? I'm working on a web app that needs to handle this. Any ideas what could be causing this? I'd love to hear your thoughts on this. The project is a desktop app built with Php. Thanks in advance! I'm using Php LTS in this project. Thanks, I really appreciate it!