Posts Tagged 'alphanumeric'

Non alphanumeric code in PHP

So a small php shell was tweeted around and it inspired me to investigate a way to execute non-alphanumeric code. First off I started with the idea of using octal escapes in PHP and constructing the escape so for example: \107 is “G” if I could construct the “107″ and add the backslash to the beginning maybe I could construct “G”. It worked like this:
$_=+””;
$_=(++$_)+(++$_)+(++$_)+(++$_);
$__=+””;
$__++;
$___=$_*$_+$__+$__+$__+$__+$__+$__+$__;//107
$___=”\\$___”;
But there was no way to evaluate the escape …

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