Manual do PHP
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# posix_getuid

(PHP 3>= 3.0.10, PHP 4 , PHP 5)

posix_getuid -- Return the real user ID of the current process

## Description

int posix_getuid ( void )

Return the numeric real user ID of the current process. See also posix_getpwuid() for information on how to convert this into a useable username.

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