Try replacing the windows signature with the one on the previous page, seems to be still valid
PHP Code:
\x55\x8B\xEC\x83\xE4\xF8\x81\xEC\x3C\x02\x00\x00\x53\x56
And for linux test this one out
PHP Code:
\x55\x89\xE5\x57\x56\x53\x81\xEC\x7C\x03\x00\x00