# phpman > man > revoutput(3am)

[REVOUTPUT(3am)](https://www.chedong.com/phpMan.php/man/REVOUTPUT/3am/markdown)                        GNU Awk Extension Modules                       [REVOUTPUT(3am)](https://www.chedong.com/phpMan.php/man/REVOUTPUT/3am/markdown)



## NAME
       revoutput - Reverse output strings sample extension

## SYNOPSIS
       @load "revoutput"

       BEGIN { REVOUT = 1 }    # Reverse all output strings

## DESCRIPTION
       The  _revoutput_  extension  adds  a simple output wrapper that reverses the characters in each
       output line.  It's main purpose is to show how to write an output wrapper, although it may be
       mildly amusing for the unwary.

## EXAMPLE
       @load "revoutput"

       BEGIN {
           REVOUT = 1
           print "hello, world" > "/dev/stdout"
       }

       The output from this program is:

       dlrow ,olleh

## BUGS
       This extension does not affect the default standard output.

## SEE ALSO
       _GAWK:_  _Effective_ _AWK_ _Programming_, [_filefuncs_(3am)](https://www.chedong.com/phpMan.php/man/filefuncs/3am/markdown), [_fnmatch_(3am)](https://www.chedong.com/phpMan.php/man/fnmatch/3am/markdown), [_fork_(3am)](https://www.chedong.com/phpMan.php/man/fork/3am/markdown), [_inplace_(3am)](https://www.chedong.com/phpMan.php/man/inplace/3am/markdown), _ord__‐
       [_chr_(3am)](https://www.chedong.com/phpMan.php/man/chr/3am/markdown), [_readdir_(3am)](https://www.chedong.com/phpMan.php/man/readdir/3am/markdown), [_readfile_(3am)](https://www.chedong.com/phpMan.php/man/readfile/3am/markdown), [_rwarray_(3am)](https://www.chedong.com/phpMan.php/man/rwarray/3am/markdown), [_time_(3am)](https://www.chedong.com/phpMan.php/man/time/3am/markdown).

## AUTHOR
       Arnold Robbins, **<arnold@skeeve.com>**.

## COPYING PERMISSIONS
       Copyright © 2012, 2013, 2018, Free Software Foundation, Inc.

       Permission is granted to make and distribute verbatim copies of this manual page provided the
       copyright notice and this permission notice are preserved on all copies.

       Permission  is granted to copy and distribute modified versions of this manual page under the
       conditions for verbatim copying, provided that the entire resulting derived work is  distrib‐
       uted under the terms of a permission notice identical to this one.

       Permission  is  granted  to copy and distribute translations of this manual page into another
       language, under the above conditions for modified versions, except that this  permission  no‐
       tice may be stated in a translation approved by the Foundation.



Free Software Foundation                     Feb 21 2018                              [REVOUTPUT(3am)](https://www.chedong.com/phpMan.php/man/REVOUTPUT/3am/markdown)