php - Is there any way to determine the *actual* session save path? -

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i know there half dozen ways value of session.save_path directive (phpinfo(), session_save_path(), etc.), when value empty string, default, actual path can of several locations. i've read it's /tmp, except when it's /var/lib/php5, on os x mountain lion it's /private/var/tmp. on windows, it's c:\windows\temp, knows.

i specify location, won't me. i'm trying diagnose tricky problem , know current location on server don't have full access to. if there's right way it, haven't been able find it. i'm open clever hacks.

i have not reviewed php source code confirm this, looks when session.save_path empty, php uses value of sys_get_temp_dir() (which varies user).


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