<?php 
$query = db("weld_logs")->where("id", post("key"))->first();
$updateArray = [];
foreach($_POST['values'] AS $column => $value) {
    $updateArray[$column] = $value;
}


echo db("weld_logs")->where([
    'spool_number' => $query->spool_number,
    'iso_number' => $query->iso_number,
])->update($updateArray);
?>