我如何使PHP堆栈跟踪的vim折叠表达式

我使用xdebug在我的Wordpress debug.log中生成堆栈跟踪，它给了我这些堆栈跟踪，看起来像这样:

[02-May-2014 16:35:14 UTC] PHP Stack trace:
[02-May-2014 16:35:14 UTC] PHP   1. {main}() /var/www/wp-admin/index.php:0
[02-May-2014 16:35:14 UTC] PHP   2. wp_dashboard() /var/www/wp-admin/index.php:125
[02-May-2014 16:35:14 UTC] PHP   3. do_meta_boxes() /var/www/wp-admin/includes/dashboard.php:149
[02-May-2014 16:35:14 UTC] PHP   4. call_user_func() /var/www/wp-admin/includes/template.php:924
[02-May-2014 16:35:14 UTC] PHP   5. wp_dashboard_site_activity() /var/www/wp-admin/includes/template.php:924
[02-May-2014 16:35:14 UTC] PHP   6. wp_dashboard_recent_posts() /var/www/wp-admin/includes/dashboard.php:538
[02-May-2014 16:35:14 UTC] PHP   7. WP_Query->__construct() /var/www/wp-admin/includes/dashboard.php:587
[02-May-2014 16:35:14 UTC] PHP   8. WP_Query->query() /var/www/wp-includes/query.php:3352
[02-May-2014 16:35:14 UTC] PHP   9. WP_Query->get_posts() /var/www/wp-includes/query.php:3246
[02-May-2014 16:35:14 UTC] PHP  10. apply_filters_ref_array() /var/www/wp-includes/query.php:3046
[02-May-2014 16:35:14 UTC] PHP  11. call_user_func_array() /var/www/wp-includes/plugin.php:256
[02-May-2014 16:35:14 UTC] PHP  12. ShareADraft->the_posts_intercept() /var/www/wp-includes/plugin.php:256

我可以在vim中匹配PHP Stack trace:，但我需要一些方法来匹配所有匹配PHP <some space here> <some number>.的行。我可以匹配这一行，但我不知道匹配所有这些行的语法。