Convert an ACF Field Group from PHP to ACF-JSON

acf-field-group-php-to-json.php

<?php
// Get all the local field groups and loop through them for processing.
$field_groups = acf_get_local_field_groups();
foreach ( $field_groups as $group ) {

	// If the field group has fields, load them into the 'fields' key. 
	if ( acf_have_local_fields( $group['key'] ) ) {
		$group['fields'] = acf_get_local_fields( $group['key'] );
	}

	// Write the group's JSON file. 
	acf_write_json_field_group( $group );
}