我有许多WordPress帖子，每个帖子都有两个标签，一个标签是州，另一个标签是机场代码。
我能够按照以下说明从标签生成下拉菜单：http://www.wprecipes.com/wordpress-hack-display-your-tags-in-a-dropdown-menu
但是，我实际上想有两个不同的下拉菜单，一个按字母顺序列出各州，另一个按字母顺序列出机场。每个机场将始终是三个大写字母。是否有我可以添加的参数，以便我可以为机场创建一个下拉列表，为国家创建另一个下拉列表？
如果它包含小写字母，则进入"状态"下拉列表。如果没有小写，则为机场。
我将您附加的教程中的代码片段修改为如下所示的内容：
function dropdown_tag_cloud( $args = '' ) {//supported: 'all', 'airport', 'state'
$defaults = array(
'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45,
'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC',
'exclude' => '', 'include' => '', 'tags_mode' => 'all'
);
$args = wp_parse_args( $args, $defaults );
print_r($args);
$tags = get_tags( array_merge($args, array('orderby' => 'count', 'order' => 'DESC')) ); // Always query top tags
if ( empty($tags) )
return;
$return = dropdown_generate_tag_cloud( $tags, $args ); // Here's where those top tags get sorted according to $args
if ( is_wp_error( $return ) ){
echo "wp error...";
return false;
}else
echo apply_filters( 'dropdown_tag_cloud', $return, $args );
}
function dropdown_generate_tag_cloud( $tags, $args = '' ) {
global $wp_rewrite;
$defaults = array(
'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45,
'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC'
);
$args = wp_parse_args( $args, $defaults );
extract($args);
if ( !$tags )
return;
$counts = $tag_links = array();
foreach ( (array) $tags as $tag ) {
if($tags_mode == 'airport'){
//if uppercased tag is equal to the tag
//which means current tag already uppercased.
if(!(strtoupper($tag->name) == $tag->name))
continue;//skip current tag
} else if($tags_mode == 'state'){
//if uppercased tag is equal to the tag
//which means current tag already uppercased.
if((strtoupper($tag->name) == $tag->name))
continue;//skip current tag
}
$counts[$tag->name] = $tag->count;
$tag_links[$tag->name] = get_tag_link( $tag->term_id );
if ( is_wp_error( $tag_links[$tag->name] ) )
return $tag_links[$tag->name];
$tag_ids[$tag->name] = $tag->term_id;
}
$min_count = min($counts);
$spread = max($counts) - $min_count;
if ( $spread <= 0 )
$spread = 1;
$font_spread = $largest - $smallest;
if ( $font_spread <= 0 )
$font_spread = 1;
$font_step = $font_spread / $spread;
// SQL cannot save you; this is a second (potentially different) sort on a subset of data.
if ( 'name' == $orderby )
uksort($counts, 'strnatcasecmp');
else
asort($counts);
if ( 'DESC' == $order )
$counts = array_reverse( $counts, true );
$a = array();
$rel = ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) ? ' rel="tag"' : '';
foreach ( $counts as $tag => $count ) {
$tag_id = $tag_ids[$tag];
$tag_link = clean_url($tag_links[$tag]);
$tag = str_replace(' ', ' ', wp_specialchars( $tag ));
$a[] = "'t<option value='$tag_link'>$tag ($count)</option>";
}
switch ( $format ) :
case 'array' :
$return =& $a;
break;
case 'list' :
$return = "<ul class='wp-tag-cloud'>'n't<li>";
$return .= join("</li>'n't<li>", $a);
$return .= "</li>'n</ul>'n";
break;
default :
$return = join("'n", $a);
break;
endswitch;
return apply_filters( 'dropdown_generate_tag_cloud', $return, $tags, $args );
}
基本上，我只是添加了名为 tags_mode 的新参数，并支持以下参数：
all
airport
state
然后，在dropdown_generate_tag_cloud()，我添加以下代码：
if($tags_mode == 'airport'){
if(!(strtoupper($tag->name) == $tag->name))
continue;//skip current tag
} else if($tags_mode == 'state'){
if((strtoupper($tag->name) == $tag->name))
continue;//skip current tag
}
这个添加的代码片段的主要思想是这样的：
strtoupper($tag->name) == $tag->name
它的工作原理是这样的：如果大写标签名称等于原始标签名称。这意味着，当前标签已经大写（或等于机场代码）。
要实现它，只需按照教程中说明进行操作即可。只是，您需要添加新参数：
<?php dropdown_tag_cloud('number=0&order=asc&tags_mode=state'); ?>
注意 &tags_mode=状态
试试看，告诉我这是否是你想要的。