Walker_PageDropdown::start_el()

最后更新于：2021-11-26 07:15:20

Starts the element output.

参数

$output

(string) (Required) Used to append additional content. Passed by reference.

$page

(GC_Post) (Required) Page data object.

$depth

(int) (Optional) Depth of page in reference to parent pages. Used for padding. Default 0.

$args

(array) (Optional) Uses ‘selected’ argument for selected page to set selected HTML attribute for option element. Uses ‘value_field’ argument to fill “value” attribute. See gc_dropdown_pages().

Default value: array()

$id

(int) (Optional) ID of the current page. Default 0 (unused).

源文件

文件: gc-includes/class-walker-page-dropdown.php

	public function start_el( &$output, $page, $depth = 0, $args = array(), $id = 0 ) {
		$pad = str_repeat( ' ', $depth * 3 );

		if ( ! isset( $args['value_field'] ) || ! isset( $page->{$args['value_field']} ) ) {
			$args['value_field'] = 'ID';
		}

		$output .= "t<option class="level-$depth" value="" . esc_attr( $page->{$args['value_field']} ) . '"';
		if ( $page->ID == $args['selected'] ) {
			$output .= ' selected="selected"';
		}
		$output .= '>';

		$title = $page->post_title;
		if ( '' === $title ) {
			/* translators: %d: ID of a post. */
			$title = sprintf( __( '#%d (no title)' ), $page->ID );
		}

		/**
		 * Filters the page title when creating an HTML drop-down list of pages.
		 *
		 * @since 3.1.0
		 *
		 * @param string  $title Page title.
		 * @param GC_Post $page  Page data object.
		 */
		$title = apply_filters( 'list_pages', $title, $page );

		$output .= $pad . esc_html( $title );
		$output .= "</option>n";
	}