Fatal error: Uncaught Error: Call to undefined function untrailingslashit() in /www/wwwroot/dianziyan/wp-includes/option.php:121
Stack trace:
#0 /www/wwwroot/dianziyan/wp-includes/default-constants.php(135): get_option('siteurl')
#1 /www/wwwroot/dianziyan/wp-settings.php(206): wp_plugin_directory_constants()
#2 /www/wwwroot/dianziyan/wp-config.php(96): require_once('/www/wwwroot/di...')
#3 /www/wwwroot/dianziyan/wp-load.php(37): require_once('/www/wwwroot/di...')
#4 /www/wwwroot/dianziyan/wp-blog-header.php(13): require_once('/www/wwwroot/di...')
#5 /www/wwwroot/dianziyan/index.php(17): require('/www/wwwroot/di...')
#6 {main}
thrown in /www/wwwroot/dianziyan/wp-includes/option.php on line 121