Display Tags In A Dropdown Menu


The first thing to do is to create the function. Paste the following code to your functions.php file:


<?php
function dropdown_tag_cloud( $args = '' ) {
$defaults = array(
'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45,
'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC',
'exclude' => '', 'include' => ''
);
$args = wp_parse_args( $args, $defaults );
$tags = get_tags( array_merge($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 ) )
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 ) {
$counts[$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 );
}
?>

Once done, you can use the function to get your dropdown menu of tags. Just open the file where you want the list to be displayed (Most of the time it is sidebar.php) and paste the following code:


<select name="tag-dropdown" onchange="document.location.href=this.options[this.selectedIndex].value;">
<option value="#">Liste d'auteurs</option>
<?php dropdown_tag_cloud('number=0&order=asc'); ?>
</select>

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