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WordPress select and checkboxes metabox callback
<?php
/**
* Show taxonomy selection in WordPress admin as single <select> box or checkboxes
*
* @author Jari Pennanen / https://github.com/ciantic
* @license Public Domain
**/
// Usage example:
register_taxonomy("my_taxonomy", array("post"), array(
// ...
// single select box
"meta_box_cb" => 'taxonomy_select_meta_box',
// list of checkboxes (no "Add categories" possibility)
"meta_box_cb" => 'taxonomy_checkbox_meta_box',
));
/**
* Display taxonomy selection as checkboxes
*
* @param WP_Post $post
* @param array $box
*/
function taxonomy_checkbox_meta_box($post, $box) {
$defaults = array('taxonomy' => 'category');
if (!isset($box['args']) || !is_array($box['args']))
$args = array();
else
$args = $box['args'];
extract(wp_parse_args($args, $defaults), EXTR_SKIP);
$tax = get_taxonomy($taxonomy);
$selected = wp_get_object_terms($post->ID, $taxonomy, array('fields' => 'ids'));
$hierarchical = $tax->hierarchical;
?>
<div id="taxonomy-<?php echo $taxonomy; ?>" class="checkdiv">
<?php if (current_user_can($tax->cap->edit_terms)): ?>
<input type="hidden" name="tax_input[<?php echo $taxonomy ?>][]" value="0" />
<ul class="categorychecklist">
<?php foreach (get_terms($taxonomy, array('hide_empty' => false)) as $term):
$value = $hierarchical ? $term->term_id : $term->slug;
?>
<li>
<label class="selectit">
<input type="checkbox" name="<?php echo "tax_input[$taxonomy][]"; ?>"
value="<?php echo esc_attr($value); ?>" <?php checked(in_array($term->term_id, $selected)); ?> />
<?php echo esc_html($term->name); ?>
</label>
</li>
<?php endforeach; ?>
</ul>
<?php endif; ?>
</div>
<?php
}
/**
* Display taxonomy selection as select box
*
* @param WP_Post $post
* @param array $box
*/
function taxonomy_select_meta_box($post, $box) {
$defaults = array('taxonomy' => 'category');
if (!isset($box['args']) || !is_array($box['args']))
$args = array();
else
$args = $box['args'];
extract(wp_parse_args($args, $defaults), EXTR_SKIP);
$tax = get_taxonomy($taxonomy);
$selected = wp_get_object_terms($post->ID, $taxonomy, array('fields' => 'ids'));
$hierarchical = $tax->hierarchical;
?>
<div id="taxonomy-<?php echo $taxonomy; ?>" class="selectdiv">
<?php if (current_user_can($tax->cap->edit_terms)): ?>
<?php
if ($hierarchical) {
wp_dropdown_categories(array(
'taxonomy' => $taxonomy,
'class' => 'widefat',
'hide_empty' => 0,
'name' => "tax_input[$taxonomy][]",
'selected' => count($selected) >= 1 ? $selected[0] : '',
'orderby' => 'name',
'hierarchical' => 1,
'show_option_all' => " "
));
} else {
?>
<select name="<?php echo "tax_input[$taxonomy][]"; ?>" class="widefat">
<option value="0"></option>
<?php foreach (get_terms($taxonomy, array('hide_empty' => false)) as $term): ?>
<option value="<?php echo esc_attr($term->slug); ?>" <?php echo selected($term->term_id, count($selected) >= 1 ? $selected[0] : ''); ?>><?php echo esc_html($term->name); ?></option>
<?php endforeach; ?>
</select>
<?php
}
?>
<?php endif; ?>
</div>
<?php
}
@thierrypigot

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@thierrypigot thierrypigot commented Mar 3, 2015

Nice job ;)

@mbenoit77

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@mbenoit77 mbenoit77 commented Jul 21, 2016

Oh, bless you!

@piperhaywood

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@piperhaywood piperhaywood commented Dec 12, 2016

Miles better than all of the other select meta box callbacks I've seen. Others were causing some pretty strange behaviour because they didn't account for non-hierarchical taxonomies. Thanks for sharing.

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