SEARCH register.custom_metabox / Utility / register.custom_metabox By Amit Singh. Posted on March 02, 2020 It will allow you to quickly register metaboxes. Last Modified By Amit Singh. Categories Arrays Caching Conditionals Core CRM Database Debugging Ecommerce Excelsheet Mailing & SMS MySQL Multi Queries PDF Social Utility WordPress Most Popular if.date_obj content.run register.post int.get template.run