gistfile2.txt

<?php
/**
 * WP Admin Settings Page
 *
 * before use:
 * download requires
 * change MY_PAGE_SLUG constant
 * change render functions
 * 
 */

require 'inc/class-wp-form-render.php';
require 'inc/class-wp-admin-page-render.php';

define('MY_PAGE_SLUG', 'page_slug');

$args = array(
    'title' => __('Test Page h1 Title','domain'), // default: ''
    'menu' => __('Test page','domain'),
    // defaults: 
    //'parent' => 'options-general.php',
    // 'permissions' => 'manage_options'
    );
$page = new WPAdminPageRender( MY_PAGE_SLUG, $args, 'page_body' );

function page_body(){

    echo 'Its page for test classes <br>';
    var_dump(get_option(MY_PAGE_SLUG));

    $inputs = array(
    	array(
    		'type' => 'checkbox',
    		'id'   => 'test',
    		'label'=> 'test label',
    		'desc' => 'test description'
    		),
    	array(
    		'type' => 'number',
    		'id'   => 'year',
    		'label'=> 'Year',
    		'before' => 'Now: ',
    		'after' => ' year.',
    		'desc' => 'Second Test field',
    		'default' => '2017'
    		),
    	);

    // default args:
    $args = array(
      'item_wrap' => array('<p>', '</p>'),
      'form_wrap' => array('<table class="table form-table"><tbody>', '</tbody></table>'),
      'label_tag' => 'th',
      'hide_desc' => false,
      'clear_value' => 'false'
      );

    $sub_name = false;
    $is_admin_options = true;
    WPForm::render(
    	apply_filters( 'dt_admin_options', $inputs, MY_PAGE_SLUG ),
        WPForm::active(MY_PAGE_SLUG, $sub_name, $is_admin_options),
    	$is_table,
        $args,
        $is_not_echo
    	);
}

add_filter( MY_PAGE_SLUG . '_columns', function(){return 2;} );

$page->add_metabox( 'handle', 'metabox label', 'metabox_body', 'side');
function metabox_body(){
	echo "Its metabox render body function. How easy? ";
	submit_button();
}

// add_action( MY_PAGE_SLUG . '_inside_side_container', 'submit_button', 20 );