file_exists, is_readable & effective UID/GID

["Manuel Vacelet" <manuel.vacelet@xxxxxxxxx>]

Hi all,

file_exists and is_readable perfom there test with real UID/GID.
Is there any functions that tests file existance with effective UID/GID ?

Note: stat is not an option because it raises an E_WARNING if the file
is not readable.

Thanks,
Manuel

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