Use this snippet to convert legacy field groups from PHP to ACF-JSON files
I was working on a legacy project recently that had a multiple Advanced Custom Fields – field groups registered with PHP. It was difficult to edit these hard coded field groups so I decided it was best to switch these to JSON. I ran the snippet below once, it converts each of the field groups from PHP into JSON and save these JSON files to the acf-json directory.
<?php
// get all the local field groups
$field_groups = acf_get_local_field_groups();
// loop over each of the gield gruops
foreach( $field_groups as $field_group ) {
// get the field group key
$key = $field_group['key'];
// if this field group has fields
if( acf_have_local_fields( $key ) ) {
// append the fields
$field_group['fields'] = acf_get_local_fields( $key );
}
// save the acf-json file to the acf-json dir by default
acf_write_json_field_group( $field_group );
}
?> 