Start the element output.

Description

See also

• Walker::start_el()

Parameters

$outputstringrequired

Used to append additional content (passed by reference).

$data_objectWP_Termrequired

The current term object.

$depthintrequired

Depth of the term in reference to parents. Default 0.

$argsarrayoptional

An array of arguments. See wp_terms_checklist().

Default:array()

$current_object_idintoptional

ID of the current term. 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;

	if ( empty( $args['taxonomy'] ) ) {
		$taxonomy = 'category';
	} else {
		$taxonomy = $args['taxonomy'];
	}

	if ( 'category' === $taxonomy ) {
		$name = 'post_category';
	} else {
		$name = 'tax_input[' . $taxonomy . ']';
	}

	$args['popular_cats'] = ! empty( $args['popular_cats'] ) ? array_map( 'intval', $args['popular_cats'] ) : array();

	$class = in_array( $category->term_id, $args['popular_cats'], true ) ? ' class="popular-category"' : '';

	$args['selected_cats'] = ! empty( $args['selected_cats'] ) ? array_map( 'intval', $args['selected_cats'] ) : array();

	if ( ! empty( $args['list_only'] ) ) {
		$aria_checked = 'false';
		$inner_class  = 'category';

		if ( in_array( $category->term_id, $args['selected_cats'], true ) ) {
			$inner_class .= ' selected';
			$aria_checked = 'true';
		}

		$output .= "\n" . '<li' . $class . '>' .
			'<div class="' . $inner_class . '" data-term-id=' . $category->term_id .
			' tabindex="0" role="checkbox" aria-checked="' . $aria_checked . '">' .
			/** This filter is documented in wp-includes/category-template.php */
			esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</div>';
	} else {
		$is_selected         = in_array( $category->term_id, $args['selected_cats'], true );
		$is_disabled         = ! empty( $args['disabled'] );
		$li_element_id       = wp_unique_prefixed_id( "in-{$taxonomy}-{$category->term_id}-" );
		$checkbox_element_id = wp_unique_prefixed_id( "in-{$taxonomy}-{$category->term_id}-" );

		$output .= "\n<li id='" . esc_attr( $li_element_id ) . "'$class>" .
			'<label class="selectit"><input value="' . $category->term_id . '" type="checkbox" name="' . $name . '[]" id="' . esc_attr( $checkbox_element_id ) . '"' .
			checked( $is_selected, true, false ) .
			disabled( $is_disabled, true, false ) . ' /> ' .
			/** This filter is documented in wp-includes/category-template.php */
			esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</label>';
	}
}

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Hooks

apply_filters( ‘the_category’, string $thelist, string $separator, string $parents )

Filters the category or list of categories.

Changelog