character-classes.txt

Character class for base64_decode, create_function, eval, and gzinflate
E.g. $oO0="cr"."eat"."e_fun"."cti"."on";$o0O=@$oO0('$x','ev'.'al'.'("?>".gz'.'inf'.'late'.'( bas'.'e64'.'_de'.'co'.'de
[\s"'.64_abcdefgilnorstuvz]+

Char class for GLOBALS
E.g. GL\x4fB\x41L\x53
[123457GLOBAS\\cfx]

Base64
[+/\dA-Za-z]

Hex and octal
E.g. \x61\76\40\x61\156\x64\x20\x61\160
[\da-fx\\]

MD5, SHA-1 and SHA-256 hashes
[\da-f]{32}
[\da-f]{40}
[\da-f]{64}

Printable ASCII, space to tilde
[\s-~]

Quotes
['"]