Reply To: ordering images of a gallery according to datepicker inside attachment page

• nomisconception

• January 8, 2018 at 3:10 am

Hi John,

thanks a lot for you help !

i share the last version code for the community.

To order images from a gallery according to a date picker field in the attachment :

<?php 
// replace by your gallery field name
$gallery = get_field('field_name');

// vars
$order = array();

// populate order
// the above code gets the date field attached to the image. 
// The 3rd parameter is false to get the unformatted value of the field to sort by.
foreach( $gallery as $i => $image ) {
	$order[ $i ] = get_field('date', $image['id'], false);
}

// multisort
array_multisort( $order, SORT_DESC, $gallery );

// loop through gallery
if( $gallery ): 

// variable
$current_header = ''; ?>
        
<?php foreach( $gallery as $i => $image ):

$date = get_field('date', $image['ID'], false);
$temp_header = date_i18n('Y', strtotime($date));

    // generate the year as header
    if ( $temp_header != $current_header ) {
        $current_header = $temp_header;
        echo "<h3>".$current_header.'</h3>';

    }
    ?>
    
    // add the image and the date
    <div>
        <img src="<?php echo $image['sizes']['medium']; ?>" alt="<?php echo $image['alt']; ?>" />
        <?php the_field('date', $image['ID']); ?>
    </div>

	<?php endforeach; ?>

<?php endif; ?>