Source

File: wp-includes/template.php

function get_query_template( $type, $templates = array() ) {
	$type = preg_replace( '|[^a-z0-9-]+|', '', $type );

	if ( empty( $templates ) ) {
		$templates = array( "{$type}.php" );
	}

	/**
	 * Filters the list of template filenames that are searched for when retrieving a template to use.
	 *
	 * The last element in the array should always be the fallback template for this query type.
	 *
	 * Possible values for `$type` include: 'index', '404', 'archive', 'author', 'category', 'tag', 'taxonomy', 'date',
	 * 'embed', 'home', 'frontpage', 'privacypolicy', 'page', 'paged', 'search', 'single', 'singular', and 'attachment'.
	 *
	 * @since 4.7.0
	 *
	 * @param array $templates A list of template candidates, in descending order of priority.
	 */
	$templates = apply_filters( "{$type}_template_hierarchy", $templates );

	$template = locate_template( $templates );

	/**
	 * Filters the path of the queried template by type.
	 *
	 * The dynamic portion of the hook name, `$type`, refers to the filename -- minus the file
	 * extension and any non-alphanumeric characters delimiting words -- of the file to load.
	 * This hook also applies to various types of files loaded as part of the Template Hierarchy.
	 *
	 * Possible values for `$type` include: 'index', '404', 'archive', 'author', 'category', 'tag', 'taxonomy', 'date',
	 * 'embed', 'home', 'frontpage', 'privacypolicy', 'page', 'paged', 'search', 'single', 'singular', and 'attachment'.
	 *
	 * @since 1.5.0
	 * @since 4.8.0 The `$type` and `$templates` parameters were added.
	 *
	 * @param string $template  Path to the template. See locate_template().
	 * @param string $type      Sanitized filename without extension.
	 * @param array  $templates A list of template candidates, in descending order of priority.
	 */
	return apply_filters( "{$type}_template", $template, $type, $templates );
}