/home/arranoyd/pi-konzalting/wp-content/themes/phlox/templates/theme-parts/entry/gallery-image.php
<?php
$main_frame_classes = 'tiles' != $layout ? 'aux-frame-mask-plain ' : '';
$main_frame_classes .= 'grid' == $layout ? 'aux-frame-ratio ' : '';
$inner_frame_classes = 'aux-frame-ratio-inner aux-frame-darken ';
$inner_frame_classes .= $add_lightbox ? 'aux-lightbox-btn ': '';
$hover_scale_class = 'grid' == $layout ? 'aux-hover-scale-circle-plus2' : 'aux-hover-scale-circle-plus';
?>
<figure class="gallery-item aux-hover-active <?php echo esc_attr( $isotope_item_classes . ' ' . $item_classes ); ?>">
<div class="<?php echo esc_attr( $main_frame_classes ); ?>">
<a href="<?php echo esc_url( $attachment_url ); ?>" class="<?php echo esc_attr( $inner_frame_classes ); ?>" <?php echo $lightbox_attrs; // already escaped ?>>
<?php if ( $add_lightbox ) { ?>
<div class="<?php echo esc_attr( $hover_scale_class ); ?>">
<span class="aux-symbol-plus"></span>
<span class="aux-symbol-circle"></span>
</div>
<?php } ?>
<?php echo $attachment_media; ?>
</a>
</div>
<?php if ( $add_caption ) { ?>
<figcaption class="wp-caption-text gallery-caption">
<?php echo $attachment_caption ?>
</figcaption>
<?php } ?>
</figure>