<?php $a = "00211501600326941"; $b = "37137137137137137"; $a = str_split($a); $b = str_split($b); Foreach($a as $key => $val){ Echo $val * $b[$key] . " " . substr($val * $b[$key], -1). "\n"; $temp[] = substr($val * $b[$key], -1); } //Var_dump($temp); //Echo implode("", $temp);
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