Summary: Here is the PHP code to retrieve data from a database table named device and another table named device_category. It then structures this data into a JSON response where devices are grouped by their category.

Explanation: 

To retrieve data from multiple tables and convert it into a JSON array in PHP, you can follow these general steps:

• Data Retrieval: The code uses Eloquent ORM to select specific columns (id_device, name_device) from the device table and (id_category, name_category) from the device_category table.

• Join Operation: It performs an inner join between the device and device_category tables based on the id_category and category_device columns respectively.

• Data Grouping: The retrieved devices are grouped by their name_category using the groupBy method, resulting in an associative array with category names as keys and collections of devices as values.

• Data Restructuring: It iterates over the grouped devices, extracting category information from the first device in each category, and maps each device to an array containing its id_device, name_device, and id_category.

• JSON Response: Finally, the restructured data is returned as a JSON response with HTTP status code 200 using Laravel's response helper function and json method.

Answered by: >Dava Gordon

Credit: >Stackoverflow

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