POSIX
PHP Manual

Constantes pré-definidas

As contantes abaixo são definidas por esta extensão e somente estarão disponíveis quando a extensão foi compilada com o PHP ou carregada dinamicamente durante a execução.

POSIX_F_OK ( integer )
Check whether the file exists.
POSIX_R_OK ( integer )
Check whether the file exists and has read permissions.
POSIX_W_OK ( integer )
Check whether the file exists and has write permissions.
POSIX_X_OK ( integer )
Check whether the file exists and has execute permissions.
POSIX_S_IFBLK ( integer )
Block special file
POSIX_S_IFCHR ( integer )
Character special file
POSIX_S_IFIFO ( integer )
FIFO (named pipe) special file
POSIX_S_IFREG ( integer )
Normal file
POSIX_S_IFSOCK ( integer )
Socket

Nota: These constants are available since PHP 5.1.0. Please also note that some of them may not be available in your system.


POSIX
PHP Manual