php man page for false

FALSE(1)							   User Commands							  FALSE(1)

NAME
       false - do nothing, unsuccessfully

SYNOPSIS
       false [ignored command line arguments]
       false OPTION

DESCRIPTION
       Exit with a status code indicating failure.

       --help display this help and exit

       --version
	      output version information and exit

       NOTE: your shell may have its own version of false, which usually supersedes the version described here.  Please refer to your shell's doc-
       umentation for details about the options it supports.

AUTHOR
       Written by Jim Meyering.

REPORTING BUGS
       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report false translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       Full documentation at: <http://www.gnu.org/software/coreutils/false>
       or available locally via: info '(coreutils) false invocation'

GNU coreutils 8.28						   January 2018 							  FALSE(1)