- print_r: documentation ( source)
- str_replace: documentation ( source)
- explode: documentation ( source)
- define: documentation ( source)
<?php
define('ORG_CHART_VARS', "'first_name', 'last_name', 'nickname', 'title', 'oc_work_status', 'oc_branch', 'oc_dept_id', 'oc_dept_card', 'oc_dept_card_group', 'oc_dept_card_sub', 'oc_emp_rank', 'about_page_URL', 'description'");
$allMetaKeys = explode(", ", str_replace("'","", ORG_CHART_VARS));
print_r($allMetaKeys);