minc.php

<?php

  /* 
    Plugin Name: MINC
  */
  
  require_once('lib/CMB2/init.php');

  class MINC_Fields {
    
  	function __contruct(){

      add_action( 'init', array($this, 'add_origin_header') );  
	  add_action( 'cmb2_admin_init', array($this, 'minc_fields') );

    }

    function add_origin_header(){
      header('Access-Control-Allow-Origin: *');
    }

    public function minc_fields(){
      $prefix = '_minc_';
      
      $minc_cmb = new_cmb2_box( array(
        'id' => 'minc',
        'title' => 'MINC Fields',
        'object_types' => array( 'post' ),
        'context' => 'normal',
        'priority' => 'high',
        'show_names' => true,
     ) );

     $minc_cmb->add_field( array(
      'name' => __( 'Website URL', 'cmb2' ),
      'id'   => $prefix . 'website',
      'type' => 'text_url'
     ) );

     $minc_cmb->add_field( array(
       'name' => __( 'Facebook URL', 'cmb2' ),
       'id'   => $prefix . 'facebook',
       'type' => 'text_url'
     ) ) ;

     $minc_cmb->add_field( array(
       'name' => __( 'Twitter URL', 'cmb2' ),
       'id'   => $prefix . 'twitter',
       'type' => 'text_url'
     ) );

     $minc_cmb->add_field( array(
       'name' => __('Email', 'cmb2' ),
       'id'   => $prefix . 'email',
       'type' => 'text_email'
     ) );

   }

   
  }
  new MINC_Fields();