In file php_open_temporary_file.c, the code test for the existence of a trailing slash on the 'path' argument
using the statement:

   if (*path+strlen(path)-1 == '/') { ...

This test is incorrect, meaning a trailing slash on, upload_tmp_dir, for example, won't be handled as intended.
A correct way to do the test would be:

  if (path[strlen(path)-1] == '/') { ...