File not found error for php

Question

Today i installed php and nginx at my laptop. I found there is always a error "File not found." when I visit 127.0.0.1/index.php if I put index.php in /tmp or subfolder of /tmp.
But if i put index.php in other folder, there is no such problem
Is there anyone who know why?
[hongy19@Archlinux http]$ cat /etc/nginx/nginx.conf |grep -C 3 -i tmp
        location ~ \.php$ {
            #root  /usr/share/pear;
            #root  /srv/http;
            root  /tmp/http;
            fastcgi_pass   unix:/var/run/php-fpm/php-fpm.sock;
            try_files $uri =404;
            fastcgi_index  index.php;
[hongy19@Archlinux http]$ cat /etc/php/php.ini |grep -i open_base
; open_basedir, if set, limits all file operations to the defined directory
open_basedir = /srv/http/:/home/:/usr/share/pear/:/tmp/:/tmp/http/
[hongy19@Archlinux http]$ ls
index.php
[hongy19@Archlinux http]$ pwd
/tmp/http

Answer 1

Hi Dan,
If you had searched you would have found out how to make this work.
Search on "crdb_adoplus.dll" or "useLegacy" and you'll find the answer. As well as setting your framework to full and not the client.
Don