zend_versionCXXV. POSIX Functions
简介
This module contains an interface to those functions defined in the IEEE 1003.1 (POSIX.1) standards document which are not accessible through other means. POSIX.1 for example defined the open(), read(), write() and close() functions, too, which traditionally have been part of PHP 3 for a long time. Some more system specific functions have not been available before, though, and this module tries to remedy this by providing easy access to these functions.
Sensitive data can be retrieved with the POSIX functions, e.g. posix_getpwnam() and friends. None of the POSIX function perform any kind of access checking when safe mode is enabled. It's therefore strongly advised to disable the POSIX extension at all (use --disable-posix in your configure line) if you're operating in such an environment.
注意: 本扩展模块在 Windows 平台下不可用。
安装
POSIX functions are enabled by default. You can disable POSIX-like functions with --disable-posix.
预定义常量
以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。
- 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
注意: These constants are available since PHP 5.1.0. Please also note that some of them may not be available in your system.
参见
The section about Process Control Functions maybe of interest for you.
目录
- posix_access Determine accessibility of a file
- posix_ctermid Get path name of controlling terminal
- posix_get_last_error Retrieve the error number set by the last posix function that failed
- posix_getcwd Pathname of current directory
- posix_getegid Return the effective group ID of the current process
- posix_geteuid Return the effective user ID of the current process
- posix_getgid Return the real group ID of the current process
- posix_getgrgid Return info about a group by group id
- posix_getgrnam Return info about a group by name
- posix_getgroups Return the group set of the current process
- posix_getlogin Return login name
- posix_getpgid Get process group id for job control
- posix_getpgrp Return the current process group identifier
- posix_getpid Return the current process identifier
- posix_getppid Return the parent process identifier
- posix_getpwnam Return info about a user by username
- posix_getpwuid Return info about a user by user id
- posix_getrlimit Return info about system resource limits
- posix_getsid Get the current sid of the process
- posix_getuid Return the real user ID of the current process
- posix_isatty Determine if a file descriptor is an interactive terminal
- posix_kill Send a signal to a process
- posix_mkfifo Create a fifo special file (a named pipe)
- posix_mknod Create a special or ordinary file (POSIX.1)
- posix_setegid Set the effective GID of the current process
- posix_seteuid Set the effective UID of the current process
- posix_setgid Set the GID of the current process
- posix_setpgid Set process group id for job control
- posix_setsid Make the current process a session leader
- posix_setuid Set the UID of the current process
- posix_strerror Retrieve the system error message associated with the given errno
- posix_times Get process times
- posix_ttyname Determine terminal device name
- posix_uname Get system name
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User Contributed NotesPOSIX Functions