我找到了解决办法。我想在所有图片下显示描述。这个解决方案非常有效。幸亏https://wordpress.stackexchange.com/users/3687/tom-auger
<?php
/*
Plugin Name: WPSE-45326 Gallery Replacement example
Plugin URI: https://wordpress.stackexchange.com/questions/45326
Description: A plugin to demonstrate how to replace the default \'gallery\' shortcode and add additional HTML tags for more customization.
Version: 1.0
Author: Tom Auger
Author URI: http://www.tomauger.com
License: GPL2
*/
class wpse_45326_Gallery_Replacement {
function __construct(){
// Hook on the plugins-loaded action since it\'s the first real action hook that\'s available to us.
// However, if you\'re using a theme and want to replace that theme\'s `gallery` custom shortcode,
// you may need to use another action. Search through your parent theme\'s files for \'gallery\' and see
// what hook it\'s using to define it\'s gallery shortcode, so you can make sure this code runs AFTER their code.
add_action( "init", array( __CLASS__, "init" ) );
}
function init(){
remove_shortcode( \'gallery\' ); // Remove the default gallery shortcode implementation
add_shortcode( \'gallery\', array( __CLASS__, "gallery_shortcode" ) ); // And replace it with our own!
}
/**
* The Gallery shortcode.
*
* This has been taken verbatim from wp-includes/media.php. There\'s a lot of good stuff in there.
* All you want to do is add some more HTML to it, and since (for some reason) they didn\'t provide more
* filters to be able to add, we have to replace the Gallery shortcode wholesale.
*
* @param array $attr Attributes of the shortcode.
* @return string HTML content to display gallery.
*/
function gallery_shortcode($attr) {
global $post;
static $instance = 0;
$instance++;
$output = apply_filters(\'post_gallery\', \'\', $attr);
if ( $output != \'\' )
return $output;
if ( isset( $attr[\'orderby\'] ) ) {
$attr[\'orderby\'] = sanitize_sql_orderby( $attr[\'orderby\'] );
if ( !$attr[\'orderby\'] )
unset( $attr[\'orderby\'] );
}
// NOTE: These are all the \'options\' you can pass in through the shortcode definition, eg: [gallery itemtag=\'p\']
extract(shortcode_atts(array(
\'order\' => \'ASC\',
\'orderby\' => \'menu_order ID\',
\'id\' => $post->ID,
\'itemtag\' => \'dl\',
\'icontag\' => \'dt\',
\'captiontag\' => \'dd\',
\'columns\' => 3,
\'size\' => \'thumbnail\',
\'include\' => \'\',
\'exclude\' => \'\',
// Here\'s the new options stuff we added to the shortcode defaults
\'titletag\' => \'p\',
\'descriptiontag\' => \'p\'
), $attr));
$id = intval($id);
if ( \'RAND\' == $order )
$orderby = \'none\';
if ( !empty($include) ) {
$include = preg_replace( \'/[^0-9,]+/\', \'\', $include );
$_attachments = get_posts( array(\'include\' => $include, \'post_status\' => \'inherit\', \'post_type\' => \'attachment\', \'post_mime_type\' => \'image\', \'order\' => $order, \'orderby\' => $orderby) );
$attachments = array();
foreach ( $_attachments as $key => $val ) {
$attachments[$val->ID] = $_attachments[$key];
}
} elseif ( !empty($exclude) ) {
$exclude = preg_replace( \'/[^0-9,]+/\', \'\', $exclude );
$attachments = get_children( array(\'post_parent\' => $id, \'exclude\' => $exclude, \'post_status\' => \'inherit\', \'post_type\' => \'attachment\', \'post_mime_type\' => \'image\', \'order\' => $order, \'orderby\' => $orderby) );
} else {
$attachments = get_children( array(\'post_parent\' => $id, \'post_status\' => \'inherit\', \'post_type\' => \'attachment\', \'post_mime_type\' => \'image\', \'order\' => $order, \'orderby\' => $orderby) );
}
if ( empty($attachments) )
return \'\';
if ( is_feed() ) {
$output = "\\n";
foreach ( $attachments as $att_id => $attachment )
$output .= wp_get_attachment_link($att_id, $size, true) . "\\n";
return $output;
}
$itemtag = tag_escape($itemtag);
$captiontag = tag_escape($captiontag);
$columns = intval($columns);
$itemwidth = $columns > 0 ? floor(100/$columns) : 100;
$float = is_rtl() ? \'right\' : \'left\';
$selector = "gallery-{$instance}";
$gallery_style = $gallery_div = \'\';
if ( apply_filters( \'use_default_gallery_style\', true ) )
$gallery_style = "
<style type=\'text/css\'>
#{$selector} {
margin: auto;
}
#{$selector} .gallery-item {
float: {$float};
margin-top: 10px;
text-align: center;
width: {$itemwidth}%;
}
#{$selector} img {
border: 2px solid #cfcfcf;
}
#{$selector} .gallery-caption {
margin-left: 0;
}
</style>
<!-- see gallery_shortcode() in wp-includes/media.php -->";
$size_class = sanitize_html_class( $size );
$gallery_div = "<div id=\'$selector\' class=\'gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}\'>";
$output = apply_filters( \'gallery_style\', $gallery_style . "\\n\\t\\t" . $gallery_div );
$i = 0;
foreach ( $attachments as $id => $attachment ) {
$link = isset($attr[\'link\']) && \'file\' == $attr[\'link\'] ? wp_get_attachment_link($id, $size, false, false) : wp_get_attachment_link($id, $size, true, false);
$output .= "<{$itemtag} class=\'gallery-item\'>";
$output .= "
<{$icontag} class=\'gallery-icon\'>
$link
</{$icontag}>";
// MODIFICATION: include the title and description HTML if we\'ve supplied the relevant shortcode parameters (titletag, descriptiontag)
if ( $captiontag ) {
$output .= "
<{$captiontag} class=\'wp-caption-text gallery-caption\'>";
// The CAPTION, if there is one
if ( trim( $attachment->post_excerpt ) ) {
$output .= "
" . wptexturize($attachment->post_excerpt);
}
// The TITLE, if we\'ve not made the \'titletag\' param blank
if ( $titletag ){
$output .= "
<{$titletag} class=\\"gallery-item-title\\">" . $attachment->post_title . "</{$titletag}>";
}
// The DESCRIPTION, if we\'ve not specified a blank \'descriptiontag\'
if ( $descriptiontag ){
$output .= "
<{$descriptiontag} class=\\"gallery-item-description\\">" . wptexturize( $attachment->post_content ) . "</{$descriptiontag}>";
}
$option .= "
</{$captiontag}>";
}
$output .= "</{$itemtag}>";
if ( $columns > 0 && ++$i % $columns == 0 )
$output .= \'<br style="clear: both" />\';
}
$output .= "
<br style=\'clear: both;\' />
</div>\\n";
return $output;
}
}
new wpse_45326_Gallery_Replacement();
