Starts the element output.

Description

See also

• Walker::start_el()

Parameters

$outputstringrequired

Used to append additional content (passed by reference).

$data_objectWP_Termrequired

Category data object.

$depthintrequired

Depth of category. Used for padding.

$argsarrayoptional

Uses 'selected', 'show_count', and 'value_field' keys, if they exist.
See wp_dropdown_categories() .

More Arguments from wp_dropdown_categories( … $args )

Array or string of arguments. See WP_Term_Query::__construct() for information on accepted arguments.

Default:array()

$current_object_idintoptional

ID of the current category. Default 0.

Source

public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {
	// Restores the more descriptive, specific name for use within this method.
	$category = $data_object;

	$pad = str_repeat( ' ', $depth * 3 );

	/** This filter is documented in wp-includes/category-template.php */
	$cat_name = apply_filters( 'list_cats', $category->name, $category );

	if ( isset( $args['value_field'] ) && isset( $category->{$args['value_field']} ) ) {
		$value_field = $args['value_field'];
	} else {
		$value_field = 'term_id';
	}

	$output .= "\t<option class=\"level-$depth\" value=\"" . esc_attr( $category->{$value_field} ) . '"';

	// Type-juggling causes false matches, so we force everything to a string.
	if ( (string) $category->{$value_field} === (string) $args['selected'] ) {
		$output .= ' selected="selected"';
	}
	$output .= '>';
	$output .= $pad . $cat_name;
	if ( $args['show_count'] ) {
		$output .= '&nbsp;&nbsp;(' . number_format_i18n( $category->count ) . ')';
	}
	$output .= "</option>\n";
}

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Hooks

apply_filters( ‘list_cats’, string $element, WP_Term|null $category )

Filters a taxonomy drop-down display element.

Changelog