STDIN/STDOUT in PHP

I've been looking for a way to work with stdin/stdout for a mod_rewrite's rewritemap. There's a working example in Perl, (just returning the input) #!/usr/bin/perl $| = 1; while (<STDIN>) {

      print $_;

} I've been trying to achieve this with fopen() read and write the php://stdin & php://stdout . #!/usr/local/bin/php -q <?php $fp = fopen("php://stdin", "r"); while (($buf = fgets($fp)) != false) {

        $input .= $buf;

} fclose($fp); $fp = fopen("php://stdout", "w");

        fputs($fp, "$input\n");

fclose($fp); ?> But no success. In the apache man they say Avoid one common mistake: never do buffered I/O on stdout! This will cause a deadloop! Hence the ``$|=1'' in the above example Could sommone give some pointers how I could achieve the perl script above in php? TIA Jim.