How do I put file in folder?

Question

file_put_contents('c_' . $id . '_node.json', $jsonData);

Currently it creates new file in root directory, but I want to put this file content in particular folder.

Answer 1

Assuming the folder exists, just add it to the first parameter

file_put_contents('PATH/TO/FOLDER_NAME/c_' . $id . '_node.json', $jsonData);