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Top Forums UNIX for Dummies Questions & Answers UNIX fun stuff - echo and dc - obfuscate/garble a string sort of Post 302938811 by newbie_01 on Thursday 19th of March 2015 05:40:50 AM
Old 03-19-2015
Hi Don,

Thanks for your reply, very much appreciated. Totally agree with what you suggested RE: delivering password security.

Just to clarify though, does that mean it is not possible to do the reverse of
Code:
echo '[q]sa[ln0=aln256%Pln256/snlbx]sb3135071790101768542287578439snlbxq'|dc

? Smilie

I am a bit curious of a way to a generate a 'magic'/garbled string of some sort. For example, how do I work out what string echo | dc would give me 'Hello World'? It does not have to be echo | dc, perhaps there is another UNIX command that is easier to use that can achieve the same thing.

I know it is trivial. I guess that is why I say UNIX fun Smilie I want to create a simple tagline of some sort to use for my scripts so I can more easily identify which ones I've written and not tampered with.

Last edited by Scrutinizer; 03-19-2015 at 06:56 AM.. Reason: CODE tags
 

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PHP_UNAME(3)								 1							      PHP_UNAME(3)

php_uname - Returns information about the operating system PHP is running on

SYNOPSIS
string php_uname ([string $mode = "a"]) DESCRIPTION
php_uname(3) returns a description of the operating system PHP is running on. This is the same string you see at the very top of the phpinfo(3) output. For the name of just the operating system, consider using the PHP_OS constant, but keep in mind this constant will con- tain the operating system PHP was built on. On some older UNIX platforms, it may not be able to determine the current OS information in which case it will revert to displaying the OS PHP was built on. This will only happen if your uname() library call either doesn't exist or doesn't work. PARAMETERS
o $mode -$mode is a single character that defines what information is returned: o 'a': This is the default. Contains all modes in the sequence "s n r v m". o 's': Operating system name. eg. FreeBSD. o 'n': Host name. eg. localhost.example.com. o 'r': Release name. eg. 5.1.2-RELEASE. o 'v': Version information. Varies a lot between operating systems. o 'm': Machine type. eg. i386. RETURN VALUES
Returns the description, as a string. EXAMPLES
Example #1 Some php_uname(3) examples <?php echo php_uname(); echo PHP_OS; /* Some possible outputs: Linux localhost 2.4.21-0.13mdk #1 Fri Mar 14 15:08:06 EST 2003 i686 Linux FreeBSD localhost 3.2-RELEASE #15: Mon Dec 17 08:46:02 GMT 2001 FreeBSD Windows NT XN1 5.1 build 2600 WINNT */ if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') { echo 'This is a server using Windows!'; } else { echo 'This is a server not using Windows!'; } ?> There are also some related Predefined PHP constants that may come in handy, for example: Example #2 A few OS related constant examples <?php // *nix echo DIRECTORY_SEPARATOR; // / echo PHP_SHLIB_SUFFIX; // so echo PATH_SEPARATOR; // : // Win* echo DIRECTORY_SEPARATOR; // echo PHP_SHLIB_SUFFIX; // dll echo PATH_SEPARATOR; // ; ?> SEE ALSO
phpversion(3), php_sapi_name(3), phpinfo(3). PHP Documentation Group PHP_UNAME(3)
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