預設常數

以下常數由擴充功能定義，因此只有在擴充功能被編譯到 PHP 中，或者在執行時被動態載入後才有效。

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.