Quellcode der automatischen Ausgabe von Galerie-Bildern beeinflussen

/**
 * semantic_gallery() - Function to filter the [gallery] shortcode. Also eliminates css style rules added when using the [gallery] shortcode.
 *
 * @since - 0.3
 * @todo see if you can improve the functionality, maybe do a subset of JT's cleaner gallery?
 */
function semantic_gallery( $attr ) {
        global $post;
        if ( isset($attr['orderby']) ) {
                $attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] );
                if ( !$attr['orderby'] )
                        unset( $attr['orderby'] );
        }


        extract( shortcode_atts( array(
                'orderby'    => 'menu_order ASC, ID ASC',
                'id'         => $post->ID,
                'itemtag'    => 'dl',
                'icontag'    => 'dt',
                'captiontag' => 'dd',
                'columns'    => 3,
                'size'       => 'thumbnail',
        ), $attr ) );


        $id           =  intval($id);
        $orderby      =  addslashes($orderby);
        $attachments  =  get_children( "post_parent=$id&post_type=attachment&post_mime_type=image&orderby={$orderby}" );


        if ( empty($attachments) )
                return NULL;


        if ( is_feed() ) {
                $output = "\n";
                foreach ( $attachments as $key => $value )
                        $output .= wp_get_attachment_link( $key, $size, true, true ) . "\n";
                return $output;
        }


        $itemtag     =  tag_escape($itemtag);
        $captiontag  =  tag_escape($captiontag);
        $columns     =  intval($columns);
        $itemwidth   =  $columns > 0 ? floor(100/$columns) : 100;


        $output = apply_filters( 'gallery_style', (string) "\n" . '<div class="zab-gallery gallery-row">', 9 ); // Available filter: gallery_style


        foreach ( $attachments as $id => $attachment ) {
                $img_lnk = get_attachment_link($id);
                $img_src = wp_get_attachment_image_src( $id, $size );
                $img_src = $img_src[0];
                $img_alt = $attachment->post_excerpt;
                if ( $img_alt == null )
                        $img_alt = $attachment->post_title;
                $img_rel = apply_filters( 'gallery_img_rel', (string) 'attachment' ); // Available filter: gallery_img_rel
                $img_class = apply_filters( 'gallery_img_class', (string) 'gallery-image' ); // Available filter: gallery_img_class


                $output  .=  "\n\t" . '<' . $itemtag . ' class="gallery-item gallery-columns-' . $columns .'">';
                $output  .=  "\n\t\t" . '<' . $icontag . ' class="gallery-icon"><a href="' . $img_lnk . '" title="' . $img_alt . '" rel="' . $img_rel . '"><img src="' . $img_src . '" alt="' . $img_alt . '" class="' . $img_class . ' attachment-' . $size . '" /></a></' . $icontag . '>';


                if ( $captiontag && trim($attachment->post_excerpt) ) {
                        $output .= "\n\t\t" . '<' . $captiontag . ' class="gallery-caption">' . $attachment->post_excerpt . '</' . $captiontag . '>';
                }


                $output .= "\n\t" . '</' . $itemtag . '>';
                if ( $columns > 0 && ++$i % $columns == 0 )
                        $output .= "\n</div>\n" . '<div class="gallery gallery-row">';
        }
        $output .= "\n</div>\n";


        return $output;
}