1<?php
  2/**
  3 * Loads the correct template based on the visitor's URL
  4 *
  5 * @package WordPress
  6 */
  7if ( wp_using_themes() ) {
  8	/**
  9	 * Fires before determining which template to load.
 10	 *
 11	 * This action hook executes just before WordPress determines which template page to load.
 12	 * It is a good hook to use if you need to do a redirect with full knowledge of the content
 13	 * that has been queried.
 14	 *
 15	 * Note: Loading a different template is not a good use of this hook. If you include another template
 16	 * and then use `exit()` or `die()`, no subsequent `template_redirect` hooks will be run, which could
 17	 * break the site’s functionality. Instead, use the {@see 'template_include'} filter hook to return
 18	 * the path to the new template you want to use. This will allow an alternative template to be used
 19	 * without interfering with the WordPress loading process.
 20	 *
 21	 * @since 1.5.0
 22	 */
 23	do_action( 'template_redirect' );
 24}
 25
 26/**
 27 * Filters whether to allow 'HEAD' requests to generate content.
 28 *
 29 * Provides a significant performance bump by exiting before the page
 30 * content loads for 'HEAD' requests. See #14348.
 31 *
 32 * @since 3.5.0
 33 *
 34 * @param bool $exit Whether to exit without generating any content for 'HEAD' requests. Default true.
 35 */
 36if ( 'HEAD' === $_SERVER['REQUEST_METHOD'] && apply_filters( 'exit_on_http_head', true ) ) {
 37	exit;
 38}
 39
 40// Process feeds and trackbacks even if not using themes.
 41if ( is_robots() ) {
 42	/**
 43	 * Fired when the template loader determines a robots.txt request.
 44	 *
 45	 * @since 2.1.0
 46	 */
 47	do_action( 'do_robots' );
 48	return;
 49} elseif ( is_favicon() ) {
 50	/**
 51	 * Fired when the template loader determines a favicon.ico request.
 52	 *
 53	 * @since 5.4.0
 54	 */
 55	do_action( 'do_favicon' );
 56	return;
 57} elseif ( is_feed() ) {
 58	do_feed();
 59	return;
 60} elseif ( is_trackback() ) {
 61	require ABSPATH . 'wp-trackback.php';
 62	return;
 63}
 64
 65if ( wp_using_themes() ) {
 66
 67	$tag_templates = array(
 68		'is_embed'             => 'get_embed_template',
 69		'is_404'               => 'get_404_template',
 70		'is_search'            => 'get_search_template',
 71		'is_front_page'        => 'get_front_page_template',
 72		'is_home'              => 'get_home_template',
 73		'is_privacy_policy'    => 'get_privacy_policy_template',
 74		'is_post_type_archive' => 'get_post_type_archive_template',
 75		'is_tax'               => 'get_taxonomy_template',
 76		'is_attachment'        => 'get_attachment_template',
 77		'is_single'            => 'get_single_template',
 78		'is_page'              => 'get_page_template',
 79		'is_singular'          => 'get_singular_template',
 80		'is_category'          => 'get_category_template',
 81		'is_tag'               => 'get_tag_template',
 82		'is_author'            => 'get_author_template',
 83		'is_date'              => 'get_date_template',
 84		'is_archive'           => 'get_archive_template',
 85	);
 86	$template      = false;
 87
 88	// Loop through each of the template conditionals, and find the appropriate template file.
 89	foreach ( $tag_templates as $tag => $template_getter ) {
 90		if ( call_user_func( $tag ) ) {
 91			$template = call_user_func( $template_getter );
 92		}
 93
 94		if ( $template ) {
 95			if ( 'is_attachment' === $tag ) {
 96				remove_filter( 'the_content', 'prepend_attachment' );
 97			}
 98
 99			break;
100		}
101	}
102
103	if ( ! $template ) {
104		$template = get_index_template();
105	}
106
107	/**
108	 * Filters the path of the current template before including it.
109	 *
110	 * @since 3.0.0
111	 *
112	 * @param string $template The path of the template to include.
113	 */
114	$template   = apply_filters( 'template_include', $template );
115	$is_stringy = is_string( $template ) || ( is_object( $template ) && method_exists( $template, '__toString' ) );
116	$template   = $is_stringy ? realpath( (string) $template ) : null;
117	if (
118		is_string( $template ) &&
119		( str_ends_with( $template, '.php' ) || str_ends_with( $template, '.html' ) ) &&
120		is_file( $template ) &&
121		is_readable( $template )
122	) {
123		/**
124		 * Fires immediately before including the template.
125		 *
126		 * @since 6.9.0
127		 *
128		 * @param string $template The path of the template about to be included.
129		 */
130		do_action( 'wp_before_include_template', $template );
131
132		include $template;
133	} elseif ( current_user_can( 'switch_themes' ) ) {
134		$theme = wp_get_theme();
135		if ( $theme->errors() ) {
136			wp_die( $theme->errors() );
137		}
138	}
139	return;
140}
141