<? $u='$'; $q="'"; $qq='"'; $s='<?'; $e='?>'; $w='eval($p);'; $p='echo"$s\r\n{$u}u=$q$u$q;\r\n{$u}q=$qq$q$qq;\r\n{$u}qq=$q$qq$q;\r\n{$u}s=$q$s$q;\r\n{$u}e=$q$e$q;\r\n{$u}w=$q$w$q;\r\n{$u}p=$q$p$q;\r\n$w$e";'; ?>
Standard input is empty
<? $u='$'; $q="'"; $qq='"'; $s='<?'; $e='?>'; $w='eval($p);'; $p='echo"$s\r\n{$u}u=$q$u$q;\r\n{$u}q=$qq$q$qq;\r\n{$u}qq=$q$qq$q;\r\n{$u}s=$q$s$q;\r\n{$u}e=$q$e$q;\r\n{$u}w=$q$w$q;\r\n{$u}p=$q$p$q;\r\n$w$e";'; eval($p); ?>