(PHP 4, PHP 5, PHP 7, PHP 8)
posix_mkfifo — Create a fifo special file (a named pipe)
posix_mkfifo() creates a special FIFO
file which exists in the file system and acts as a bidirectional communication endpoint for processes.
filename
Path to the FIFO
file.
permissions
The second parameter permissions
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).