I use php as a cgi usuing Apache's "Action" directive.  If I put a script in /u/joe/pub/example.php and visit http://joe/example.php/foo then Apache puts /example.php/foo in PATH_INFO, and PHP tries to open /u/joe/pub/example.php/foo.  (Internal server error; premature end of script headers)

This patch checks /u, /u/joe, /u/joe/pub, etc.; if one of them is a regular file (in this case /u/joe/pub/example.php) then that file is used as the script filename.  Now the script runs, with the entire PATH_INFO passed to it.  (It's up to the script to figure out which part to ignore.)

--- main/fopen_wrappers.c.orig	Fri Aug 23 01:00:49 2002
+++ main/fopen_wrappers.c	Sun Nov  3 02:54:26 2002
@@ -388,6 +388,23 @@
 		SG(request_info).path_translated = NULL;
 		return FAILURE;
 	}
+
+	/* check for /home/joe/public_html/example.php/pathinfo */
+	if (1) {
+		char *s;
+		for (s=filename+1; *s; s++) {
+			if (*s == PHP_DIR_SEPARATOR && *(s-1) != PHP_DIR_SEPARATOR) {
+				*s = 0;
+				if (0 == stat (filename, &st)) {
+					if (S_ISREG(st.st_mode)) {
+						break;
+					}
+				}
+				*s = PHP_DIR_SEPARATOR;
+			}
+		}
+	}
+
 	fp = VCWD_FOPEN(filename, "rb");
 
 	/* refuse to open anything that is not a regular file */