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Walker_PageDropdown::start_el( string $output, WP_Post $page, int $depth, array $args = array(), int $id )

Starts the element output.

Description

See also

Parameters

$output

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

$page

(WP_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 wp_dropdown_pages().

Default value: array()

$id

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

Source

File: wp-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 WP_Post $page  Page data object.
		 */
		$title = apply_filters( 'list_pages', $title, $page );

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

Uses

Uses Description
wp-includes/l10n.php: __()

Retrieve the translation of $text.
wp-includes/formatting.php: esc_attr()

Escaping for HTML attributes.
wp-includes/formatting.php: esc_html()

Escaping for HTML blocks.
wp-includes/plugin.php: apply_filters()

Calls the callback functions that have been added to a filter hook.
wp-includes/class-walker-page-dropdown.php: list_pages

Filters the page title when creating an HTML drop-down list of pages.

Changelog

Version Description
2.1.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/walker_pagedropdown/start_el