<?php $arr = [0 => '3',1 => '2',2 => '1',3 => '0']; $rev = array_reverse($arr); // print_r($arr); $i = 0; $list = []; while ($i < count($arr)) { $list[] = $rev[$i]; $i++; } print_r($list); $i = 0; $list = []; while ($i < count($arr)) { $list[$arr[$i]] = $rev[$i]; $i++; } print_r($list);
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