Themes: Add actions to template loading to assist with collecting debug info.

This introduces the following new actions which wrap the process of loading a template file:

* `wp_before_load_template`
* `wp_after_load_template`

Props rmccue, tabrisrp, peterwilsoncc

Fixes #54541

Built from https://develop.svn.wordpress.org/trunk@53560


git-svn-id: http://core.svn.wordpress.org/trunk@53149 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/template.php

@@ -713,7 +713,31 @@ function locate_template( $template_names, $load = false, $require_once = true,
 	}
 
 	if ( $load && '' !== $located ) {
+		/**
+		 * Fires before a located template is loaded.
+		 *
+		 * @since 6.1.0
+		 *
+		 * @param string       $located        The template filename.
+		 * @param string|array $template_names Template file(s) to search for, in order.
+		 * @param bool         $require_once   Whether to require_once or require.
+		 * @param array        $args           Additional arguments passed to the template.
+		 */
+		do_action( 'wp_before_load_template', $located, $template_names, $require_once, $args );
+
 		load_template( $located, $require_once, $args );
+
+		/**
+		 * Fires after a located template is loaded.
+		 *
+		 * @since 6.1.0
+		 *
+		 * @param string       $located        The template filename.
+		 * @param string|array $template_names Template file(s) to search for, in order.
+		 * @param bool         $require_once   Whether to require_once or require.
+		 * @param array        $args           Additional arguments passed to the template.
+		 */
+		do_action( 'wp_after_load_template', $located, $template_names, $require_once, $args );
 	}
 
 	return $located;

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53559';
+$wp_version = '6.1-alpha-53560';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.