Administration: When editing a plugin or theme file, close any active PHP session.

This prevents HTTP requests from timing out when attempting to connect back to the site.

Props bruandet, vjik, donmhico, SergeyBiryukov.
Fixes #43358.
Built from https://develop.svn.wordpress.org/trunk@47457


git-svn-id: http://core.svn.wordpress.org/trunk@47244 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/file.php

@@ -550,6 +550,13 @@ function wp_edit_theme_plugin_file( $args ) {
 		} else {
 			$url = admin_url();
 		}
+
+		if ( PHP_SESSION_ACTIVE === session_status() ) {
+			// Close any active session to prevent HTTP requests from timing out
+			// when attempting to connect back to the site.
+			session_write_close();
+		}
+
 		$url                    = add_query_arg( $scrape_params, $url );
 		$r                      = wp_remote_get( $url, compact( 'cookies', 'headers', 'timeout', 'sslverify' ) );
 		$body                   = wp_remote_retrieve_body( $r );

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-47456';
+$wp_version = '5.5-alpha-47457';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.