<?php $variable="$xtttt$yddd$hhh"; $variable2='$xtttt$yddd$hhh'; echo $variable, "\n", $variable2;
Standard input is empty
$xtttt$yddd$hhh
PHP Notice: Undefined variable: xtttt in /home/vF5pSC/prog.php on line 3 PHP Notice: Undefined variable: yddd in /home/vF5pSC/prog.php on line 3 PHP Notice: Undefined variable: hhh in /home/vF5pSC/prog.php on line 3