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get_parent_theme_file_uri( string $file = '' )

Retrieves the URL of a file in the parent theme.

Parameters

$file

(string) (Optional) File to return the URL for in the template directory.

Default value: ''

Return

(string) The URL of the file.

Source

File: wp-includes/link-template.php 

function get_parent_theme_file_uri( $file = '' ) {
	$file = ltrim( $file, '/' );

	if ( empty( $file ) ) {
		$url = get_template_directory_uri();
	} else {
		$url = get_template_directory_uri() . '/' . $file;
	}

	/**
	 * Filters the URL to a file in the parent theme.
	 *
	 * @since 4.7.0
	 *
	 * @param string $url  The file URL.
	 * @param string $file The requested file to search for.
	 */
	return apply_filters( 'parent_theme_file_uri', $url, $file );
}

Uses

Uses Description
wp-includes/link-template.php: parent_theme_file_uri

Filters the URL to a file in the parent theme.
wp-includes/theme.php: get_template_directory_uri()

Retrieves template directory URI for current theme.
wp-includes/plugin.php: apply_filters()

Calls the callback functions that have been added to a filter hook.

Changelog

Version Description
4.7.0 Introduced.

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