In my WP plugin, I need to store array from a jason file.
PHP callback retrieve $_POST['some key'] and return to jquery ajax echo sub array json_encode(array['some key']).

1. First time : $my_array = json_decode(file_get_contents($filename), true)) and return to jquery ajax echo json_encode(my_array)
2. Second time : $my_array = my_array[$_POST['some key']] return to jquery ajax echo json_encode(my_array)
3. Third time :

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<code>$my_array = my_array[$_POST['some other key']] return json_encode(my_array)

</code>

<code>$my_array = my_array[$_POST['some other key']] return json_encode(my_array) </code>

$my_array = my_array[$_POST['some other key']] return json_encode(my_array)

How to store value of my_array to avoid global variable ? I read that global variable is not a good way. It’s same with $filename …