Source
File: wp-admin/includes/meta-boxes.php
function post_categories_meta_box( $post, $box ) {
$defaults = array( 'taxonomy' => 'category' );
if ( ! isset( $box['args'] ) || ! is_array( $box['args'] ) ) {
$args = array();
} else {
$args = $box['args'];
}
$parsed_args = wp_parse_args( $args, $defaults );
$tax_name = esc_attr( $parsed_args['taxonomy'] );
$taxonomy = get_taxonomy( $parsed_args['taxonomy'] );
?>
<div id="taxonomy-<?php echo $tax_name; ?>" class="categorydiv">
<ul id="<?php echo $tax_name; ?>-tabs" class="category-tabs">
<li class="tabs"><a href="#<?php echo $tax_name; ?>-all"><?php echo $taxonomy->labels->all_items; ?></a></li>
<li class="hide-if-no-js"><a href="#<?php echo $tax_name; ?>-pop"><?php echo esc_html( $taxonomy->labels->most_used ); ?></a></li>
</ul>
<div id="<?php echo $tax_name; ?>-pop" class="tabs-panel" style="display: none;">
<ul id="<?php echo $tax_name; ?>checklist-pop" class="categorychecklist form-no-clear" >
<?php $popular_ids = wp_popular_terms_checklist( $tax_name ); ?>
</ul>
</div>
<div id="<?php echo $tax_name; ?>-all" class="tabs-panel">
<?php
$name = ( 'category' === $tax_name ) ? 'post_category' : 'tax_input[' . $tax_name . ']';
// Allows for an empty term set to be sent. 0 is an invalid term ID and will be ignored by empty() checks.
echo "<input type='hidden' name='{$name}[]' value='0' />";
?>
<ul id="<?php echo $tax_name; ?>checklist" data-wp-lists="list:<?php echo $tax_name; ?>" class="categorychecklist form-no-clear">
<?php
wp_terms_checklist(
$post->ID,
array(
'taxonomy' => $tax_name,
'popular_cats' => $popular_ids,
)
);
?>
</ul>
</div>
<?php if ( current_user_can( $taxonomy->cap->edit_terms ) ) : ?>
<div id="<?php echo $tax_name; ?>-adder" class="wp-hidden-children">
<a id="<?php echo $tax_name; ?>-add-toggle" href="#<?php echo $tax_name; ?>-add" class="hide-if-no-js taxonomy-add-new">
<?php
/* translators: %s: Add New taxonomy label. */
printf( __( '+ %s' ), $taxonomy->labels->add_new_item );
?>
</a>
<p id="<?php echo $tax_name; ?>-add" class="category-add wp-hidden-child">
<label class="screen-reader-text" for="new<?php echo $tax_name; ?>"><?php echo $taxonomy->labels->add_new_item; ?></label>
<input type="text" name="new<?php echo $tax_name; ?>" id="new<?php echo $tax_name; ?>" class="form-required form-input-tip" value="<?php echo esc_attr( $taxonomy->labels->new_item_name ); ?>" aria-required="true"/>
<label class="screen-reader-text" for="new<?php echo $tax_name; ?>_parent">
<?php echo $taxonomy->labels->parent_item_colon; ?>
</label>
<?php
$parent_dropdown_args = array(
'taxonomy' => $tax_name,
'hide_empty' => 0,
'name' => 'new' . $tax_name . '_parent',
'orderby' => 'name',
'hierarchical' => 1,
'show_option_none' => '— ' . $taxonomy->labels->parent_item . ' —',
);
/**
* Filters the arguments for the taxonomy parent dropdown on the Post Edit page.
*
* @since 4.4.0
*
* @param array $parent_dropdown_args {
* Optional. Array of arguments to generate parent dropdown.
*
* @type string $taxonomy Name of the taxonomy to retrieve.
* @type bool $hide_if_empty True to skip generating markup if no
* categories are found. Default 0.
* @type string $name Value for the 'name' attribute
* of the select element.
* Default "new{$tax_name}_parent".
* @type string $orderby Which column to use for ordering
* terms. Default 'name'.
* @type bool|int $hierarchical Whether to traverse the taxonomy
* hierarchy. Default 1.
* @type string $show_option_none Text to display for the "none" option.
* Default "— {$parent} —",
* where `$parent` is 'parent_item'
* taxonomy label.
* }
*/
$parent_dropdown_args = apply_filters( 'post_edit_category_parent_dropdown_args', $parent_dropdown_args );
wp_dropdown_categories( $parent_dropdown_args );
?>
<input type="button" id="<?php echo $tax_name; ?>-add-submit" data-wp-lists="add:<?php echo $tax_name; ?>checklist:<?php echo $tax_name; ?>-add" class="button category-add-submit" value="<?php echo esc_attr( $taxonomy->labels->add_new_item ); ?>" />
<?php wp_nonce_field( 'add-' . $tax_name, '_ajax_nonce-add-' . $tax_name, false ); ?>
<span id="<?php echo $tax_name; ?>-ajax-response"></span>
</p>
</div>
<?php endif; ?>
</div>
<?php
}