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Custom Taxonomy Terms Dropdown Function

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The dropdown taxonomy term function will enable you to show custom taxonomies in a dropdown menu. It supports both hierarchal (category-type) and non-hierarchal (tag-type) taxonomies.

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  1. function dropdown_taxonomy_term( $taxonomy, $args = '' ) {
  2. 	$defaults = array(
  3. 		'orderby' => 'name',
  4. 		'order' => 'ASC',
  5. 		'hide_empty' => 1,
  6. 		'format' => 'flat',
  7. 		'number' => 45,
  8. 		'hide_empty' => 1,
  9. 		'fields' => 'all',
  10. 		'slug' => '',
  11. 		'hierarchical' => 1,
  12. 		'name__like' => '',
  13. 		'pad_counts' => 0,
  14. 		'get' => '',
  15. 		'child_of' => 0,
  16. 		'parent' => ''
  17. 	);
  18.  
  19. 	$args = wp_parse_args( $args, $defaults );
  20.  
  21. 	$terms = get_terms( $taxonomy, array_merge($args, array('orderby' => 'count', 'order' => 'DESC')) );
  22.  
  23. 	if ( empty($terms) )
  24. 		return;
  25.  
  26. 	$return = dropdown_generate_taxonomy_term( $terms, $taxonomy, $args );
  27.  
  28. 	if ( is_wp_error( $return ) )
  29. 		return false;
  30. 	else
  31. 		echo apply_filters( 'dropdown_taxonomy_term', $return, $args );
  32. }
  33.  
  34.  
  35. function dropdown_generate_taxonomy_term( $terms, $taxonomy, $args = '' ) {
  36. 	global $wp_rewrite;
  37.  
  38. 	$defaults = array(
  39. 		'orderby' => 'name',
  40. 		'order' => 'ASC',
  41. 		'hide_empty' => 1,
  42. 		'format' => 'flat',
  43. 		'number' => 45,
  44. 		'hide_empty' => 1,
  45. 		'fields' => 'all',
  46. 		'slug' => '',
  47. 		'hierarchical' => 1,
  48. 		'name__like' => '',
  49. 		'pad_counts' => 0,
  50. 		'get' => '',
  51. 		'child_of' => 0,
  52. 		'parent' => ''
  53. 	);
  54.  
  55. 	$args = wp_parse_args( $args, $defaults );
  56.  
  57. 	extract($args);
  58.  
  59. 	if ( !$terms )
  60. 		return;
  61.  
  62. 	$counts = $term_links = array();
  63.  
  64. 	foreach ( (array) $terms as $term ) {
  65. 		$counts[$term->name] = $term->count;
  66. 		$term_links[$term->name] = get_term_link( $term->name, $taxonomy );
  67. 		if ( is_wp_error( $term_links[$term->name] ) )
  68. 			return $term_links[$term->name];
  69. 		$term_ids[$term->name] = $term->term_id;
  70. 	}
  71.  
  72. 	$min_count = min($counts);
  73. 	$spread = max($counts) - $min_count;
  74.  
  75. 	if ( $spread <= 0 )
  76. 		$spread = 1;
  77.  
  78. 	$font_spread = $largest - $smallest;
  79.  
  80. 	if ( $font_spread <= 0 )
  81. 		$font_spread = 1;
  82.  
  83. 	$font_step = $font_spread / $spread;
  84.  
  85. 	if ( 'name' == $orderby )
  86. 		uksort($counts, 'strnatcasecmp');
  87. 	else
  88. 		asort($counts);
  89.  
  90. 	if ( 'DESC' == $order )
  91. 		$counts = array_reverse( $counts, true );
  92. 	$a = array();
  93.  
  94. 	$rel = ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) ? ' rel="term"' : '';
  95.  
  96. 	foreach ( $counts as $term => $count ) {
  97. 		$term_id = $term_ids[$term];
  98. 		$term_link = clean_url($term_links[$term]);
  99. 		$term = str_replace(' ', '&nbsp;', wp_specialchars( $term ));
  100. 		$a[] = "\t<option value='$term_link'>$term ($count)</option>";
  101. 	}
  102.  
  103. 	switch ( $format ) :
  104.  
  105. 	case 'array' :
  106. 		$return =& $a;
  107. 		break;
  108.  
  109. 	case 'list' :
  110. 		$return = "<ul class='wp-taxonomy-term'>\n\t<li>";
  111. 		$return .= join("</li>\n\t<li>", $a);
  112. 		$return .= "</li>\n</ul>\n";
  113. 		break;
  114.  
  115. 	default :
  116. 		$return = join("\n", $a);
  117. 		break;
  118.  
  119. 	endswitch;
  120.  
  121. 	return apply_filters( 'dropdown_generate_taxonomy_term', $return, $terms, $args );
  122. }

URL: http://snipplr.com/view/41042/custom-taxonomy-terms-dropdown-template-tag/

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