Skip to content

Instantly share code, notes, and snippets.

@igorw

igorw/mutation.php

Created May 5, 2014 18:28
Show Gist options
  • Save igorw/4316810f8875f7e18b24 to your computer and use it in GitHub Desktop.
Save igorw/4316810f8875f7e18b24 to your computer and use it in GitHub Desktop.
Download ZIP
Self-modifying quasi-quine. Try running it, then piping the output into PHP. Then piping that output into PHP again. Then piping that output into PHP again. Then piping that output into PHP again. Then piping that output into PHP again. Then piping that output into PHP again.
Raw
mutation.php
<?php
$data = <<<'DATA'
$program = <<<PROGRAM
<?php
\$data = <<<'DATA'\n$data\nDATA;
$data
PROGRAM;
$n = 0;
if ($n >= 5) {
echo "OMFG!\n";
} else {
echo str_replace('$n = 0;', '$n = '.($n+1).';', $program);
}
DATA;
$program = <<<PROGRAM
<?php
\$data = <<<'DATA'\n$data\nDATA;
$data
PROGRAM;
$n = 0;
if ($n >= 5) {
echo "OMFG!\n";
} else {
echo str_replace('$n = 0;', '$n = '.($n+1).';', $program);
}
@enygma
Copy link

enygma commented May 5, 2014

=== Skynet?

@igorw
Copy link
Author

igorw commented May 6, 2014

@enygma you got it!

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment