<?php $one = "4,5,5,4,7"; $two = "3,5,6,4,2"; $aone = explode(",", $one); $atwo = explode(",", $two); $result= ""; For($i=0;$i<count($aone);$i++){ If($atwo[$i] > $aone[$i]){ $result[] = $atwo[$i]; }else{ $result[] = $aone[$i]; } } Var_dump($result); $str = implode(",", $result); Echo $str;
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