Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

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

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