# posix_mkfifo

(PHP 4, PHP 5, PHP 7)

posix_mkfifo — Create a fifo special file (a named pipe)

### 说明

posix_mkfifo ( string `$pathname` , int `$mode` ) : bool

posix_mkfifo() creates a special FIFO file which exists in the file system and acts as a bidirectional communication endpoint for processes.

### 参数

`pathname`

  Path to the FIFO file.

`mode`

  The second parameter `mode` has to be given in octal notation (e.g. 0644). The permission of the newly created FIFO also depends on the setting of the current umask(). The permissions of the created file are (mode & ~umask).

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

### 注释

> Note: 当启用 安全模式时， PHP 会检查被操作的文件或目录是否与被执行的脚本有相同的 UID（所有者）。