CMB 2 custom code

/*Display CMB2 file_list item*/
----------------------------------
	<?php
	  $images = get_post_meta($post->ID, 'light_image', true);
	  foreach( $images as $image ) {
	  echo '
		<img src="' . $image. '" alt="" />';
	}
	?>
/ Display CMB2 file_list item with image title its mainly needed for lightbox
<?php
	$images_list = get_post_meta($post->ID, 'galery_list', true);
	foreach( $images_list  as $attachment_id => $attachment_url  ) {
	$attachment_title = get_the_title($attachment_id);
	echo '<a title="'.$attachment_title.'" href="' . $attachment_url. '"></a>';
	} ?>

/ Display CMB2 file_list item with image crop size its mainly needed for lightbox
<ul class="slides">
<?php

    $idd = get_the_ID();
	  $images = get_post_meta($idd, 'gallery_lis', true);

            if ( $images ) {
              foreach ( $images as $attachment_id => $img_full_url ) {
				// image with img tag into a tag
				$attachment_id;
				// image src only
				$img_full_url;
				// image with img tag into a tag with crop size
               $full = wp_get_attachment_link($attachment_id, 'crop_name');
				// img src with crop size
				$image_attributes = wp_get_attachment_image_src( $attachment_id, 'gall-image' );
				echo $image_attributes[0];

                echo "<li>";
                echo $full;
                echo "</li>";

              }
            }
?>
</ul>
resource : https://goo.gl/X6fy84

/*Display CMB2 checkbox field with condition*/
----------------------------------
<?php
$idd = get_the_ID();
$image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), '' );
$video_url= get_post_meta($idd, 'video_url', true);
$video_check= get_post_meta($idd, 'video_checkbox', true);
		if($video_check == 'on'){
			$img_linkk =  $video_url;
			$imag_clss = 'mfp-iframe';
		} else{
			$img_linkk =  $image[0];
			$imag_clss = 'gallery-items';
		} ?>
<a class="<?php echo $imag_clss; ?>" title="<?php the_title();?>" href="<?php echo $img_linkk; ?>"></a>

----------  or  -------------
<?php $pdfpop = get_post_meta($post->ID, 'pdf-pop', true); ?>
<?php if($pdfpop == 'on'):?>
	//condition content
<?php else :?>
	//default content
<?php endif; ?>

/*Display CMB2 checkbox field with condition into query*/
----------------------------------
'meta_query' => array(
		array(
			'key'     => 'feature_checkbox',
			'value'   => 'on',
			'compare' => 'LIKE',
		),
	),

/*Display CMB2 select field with condition*/
----------------------------------
<?php
$idd = get_the_ID();
$select_big = get_post_meta($idd, 'select_big', true);
		if($select_big == 'Big'){
			$namdilam = 'grid-item--width2';
		} else{
			$namdilam = 'small_grid';
		}
?>
<?php
 if($select_big == 'Big'){
		the_post_thumbnail('gallr-big');
	} else{
		the_post_thumbnail('galler-small');
	}
?>

/*Display CMB2 Date field*/
----------------------------------
	<?php
	$date = get_post_meta($post->ID, 'light_image', true);
	echo date("d/m/y", $date );
?>


/*Display CMB2 Group item*/
----------------------------------

			<?php
				$meta_entries_pre = get_post_meta( get_the_ID(), 'repeat_group', true );
				$meta_entries_int = array_reverse( $meta_entries_pre );
				$meta_entries = array_slice( $meta_entries_int, 0, 3 );
				if( ! empty( $meta_entries ) ) { ?>

				<div class="escrts_testimonials_content fix">

				<?php foreach ( (array) $meta_entries as $key => $entry ) {
					$product_name = $product_description = $meta_link = '';
					if ( isset( $entry['author_testimonial'] ) ) $product_name = $entry['author_testimonial'];
					if ( isset( $entry['testimonial_desc'] ) ) $product_description = $entry['testimonial_desc'];
					if ( isset( $entry['product_image'] ) ) $product_image = esc_html( $entry['product_image'] ); ?>
                <li>
					?>
						<div class="escorts_single_testimonial fix">
							<div class="escorts_test_cont fix">
								<p>“<?php echo $product_description; ?>”</p>
								<img src="<?php echo $product_image; ?>" alt="" />
							</div>
							<div class="escorts_test_owner fix">
								<p>– <?php echo $product_name; ?></p>
							</div>
						</div>
				<?php } ?>
				</div>
				<?php } ?>

Limit to specific page template
==================================
$cmb = new_cmb2_box( array(
        'id'           => 'contact-information',
        'title'        => 'Contact Information',
        'object_types' => array( 'page' ), // post type
        'show_on'      => array( 'key' => 'page-template', 'value' => 'template-contact.php' ),
        'context'      => 'normal', //  'normal', 'advanced', or 'side'
        'priority'     => 'high',  //  'high', 'core', 'default' or 'low'
        'show_names'   => true, // Show field names on the left
    ) );

Allow metabox to show up everywhere except a specified list of page IDs
--------------------------------------------------------------------------
add_action( 'cmb2_init', 'cmb2_add_metabox' );
function cmb2_add_metabox() {

	$cmb = new_cmb2_box( array(
		'id'           => 'metabox',
		'title'        => __( 'Metabox Title', 'cmb2' ),
		'object_types' => array( 'page', 'banner-items' ),
		'context'      => 'normal',
		'priority'     => 'default',
    'exclude_ids' => array(  1, 2, 3, 55 ), // Exclude metabox on these post-ids
	'show_on_cb' => 'cmb2_exclude_for_ids',
	) );

	$cmb->add_field( array(
		'name' => __( 'this is test', 'cmb2' ),
		'id' => 'baner_img',
		'type' => 'file',
	) );

}

function cmb2_exclude_for_ids( $cmb ) {
	$ids_to_exclude = $cmb->prop( 'exclude_ids', array() );
	$excluded = in_array( $cmb->object_id(), $ids_to_exclude, false );
	return ! $excluded;
}


cmb2 custom group field
=========================
This code for make group field as your requirement into cmb2 config.php
-----------------------------------------------------------------------

$dim_group = $products_cmb->add_field( array(
    'id'          => $prefix.'product-dim',
    'type'        => 'group',
    'description' => __( 'Enter Your Technical Data ', 'cmb' ),
	'name'		=>	__('Technical Data ', 'ecomed'),
		'options'     => array(
			'group_title'   => __( 'Data Group {#}', 'ecomed' ), // since version 1.1.4, {#} gets replaced by row number
			'add_button'    => __( 'Add Another Data', 'cmb' ),
			'remove_button' => __( 'Remove Data', 'cmb' ),
			'sortable'      => true, // beta
		),
	) );

		// Id's for group's fields only need to be unique for the group. Prefix is not needed.
		$products_cmb->add_group_field( $dim_group, array(
			'name' => 'Referência',
			'id'   => 'ref',
			'type' => 'text',
		) );

		// Id's for group's fields only need to be unique for the group. Prefix is not needed.
		$products_cmb->add_group_field( $dim_group, array(
			'name' => 'Avanço',
			'id'   => 'avg',
			'type' => 'text',
		) );

		// Id's for group's fields only need to be unique for the group. Prefix is not needed.
		$products_cmb->add_group_field( $dim_group, array(
			'name' => 'Descrição',
			'id'   => 'desc',
			'type' => 'textarea',
		) );

		// Id's for group's fields only need to be unique for the group. Prefix is not needed.
		$products_cmb->add_group_field( $dim_group, array(
			'name' => 'Unidade',
			'id'   => 'unit',
			'type' => 'text',
		) );


this code for display them
---------------------------------------
	<?php
	$product_dim	= get_post_meta( get_the_ID(), $prefix.'product-dim', true );
	foreach ( (array) $product_dim as $key => $entry ) {

		$ref = $avg = $desc = $unit = '';

		if ( isset( $entry['ref'] ) )
			$ref = esc_html( $entry['ref'] );
		if ( isset( $entry['avg'] ) )
			$avg = esc_html( $entry['avg'] );
		if ( isset( $entry['desc'] ) )
			$desc = esc_html( $entry['desc'] );
		if ( isset( $entry['unit'] ) )
			$unit = esc_html( $entry['unit'] );

	?>

	<div class="sproduct_table_col">
		<div class="sproduct_row_ref"><p><?php echo $ref; ?></p></div>
		<div class="sproduct_row_avg"><p><?php echo $avg; ?></p></div>
		<div class="sproduct_row_des"><p><?php echo $desc; ?></p></div>
		<div class="sproduct_row_unit"><p><?php echo $unit; ?></p></div>
	</div>
	<?php }
	?>