Code Snippet 3 - https://solusipress.com/sisi-koding-wordpress-custom-post-dan-custom-fields/

snippet-3.php

<?php
add_shortcode( 'solusipress_event_date_price', 'solusipress_event_date_price_cb' );
add_shortcode( 'solusipress_event_sponsors', 'solusipress_event_sponsors_cb' );

function solusipress_event_date_price_cb( $atts ) {

	$prefix = '_spevt_';	  
  	$meta_d1 = get_post_meta( get_the_ID(), $prefix.'start_date', true );
  	$meta_d2 = get_post_meta( get_the_ID(), $prefix.'end_date', true );
  	$price = get_post_meta( get_the_ID(), $prefix.'price', true );
  	$url = get_post_meta( get_the_ID(), $prefix.'buy_url', true );
	
  	$html = '';
  	ob_start(); ?>
  	<div class="container event-date-price">
		<div class="row">
	  		<div class="col-6 date-box">
	  			<?php
				$start_date = date( 'Y-m-d H:i:s', $meta_d1 );	
				$end_date = date( 'Y-m-d H:i:s', $meta_d2 );
	  			$diff = date_diff( date_create( $end_date ), date_create( $start_date ) );
	  			?>
				<div class="event the-date">
					<span class="the-date-date_start"><?php echo date( 'l, d-M-Y', $meta_d1 ) ?></span>
				  	<?php if( $diff->days > 0 ): ?>
					  	<strong> - </strong> <span class="the-date-date_end"><?php echo date( 'l, d-M-Y', $meta_d2 ) ?></span>
					<?php else: ?>
						<br><span class="the-date-time_start"><?php echo date( 'g:iA', $meta_d1 ) ?></span> - 
					  	<span class="the-date-time_end"><?php echo date( 'g:iA', $meta_d2 ) ?></span>
					<?php endif; ?>
				</div>
	   		</div>
	  		<div class="col-6 price-box">
	  			<div class="event the-price">
					<span class="the-price-rate">IDR <?php echo $price ?></span>
				</div>
				<a href="<?php echo $url ?>" target="_blank">Get Ticket</a>
	   		</div>
	  	</div>
	</div>
	<?php
  	$html = ob_get_contents();
  	ob_end_clean();
  
  	return $html;
  
}

function solusipress_event_sponsors_cb( $atts ) {
  
  	$prefix = '_spevt_';	  
	$entries = get_post_meta( get_the_ID(), $prefix.'sponsor_group', true );	  
	$html = ''; 
  	$cols = 3;
  	$class = 'col-4';
  	ob_start(); ?>
	<div class="container">
		<?php $i = 0; foreach ( (array) $entries as $key => $entry ): ?>
		  	<?php 
		  	if( $i % $cols == 0 ) { 
			  	if( $i > 0 ) echo '</div>';
			  	echo '<div class="row">'; 
			} 
  			?>
			<div class="<?php echo $class ?>" style="padding:10px;">
			<img src="<?php echo $entry['logo'] ?>">
			</div>
		<?php $i++; endforeach; ?>
	</div>
  	<?php
  	$html = ob_get_contents();
  	ob_end_clean();
  	return $html;
}