finding shells on google
just type any of this on google

inurl:c99.php safe-mode: off (not secure)
inurl:c99.php safe-mode: on
inurl:r57.php safe_mode: off
inurl:r57.php safe_mode: on
intitle:.com - phpshell
intitle:.org - phpshell
inurl:.com - ashshell
intitle:.org - locus7shell
intitle:.com - locus7shell