<?php $array = array('red1', 'blue1', 'red2', 'red3', 'blue2' ); $redValues = preg_grep("/^red\d+$/i", $array); $result = array_replace($array, array_combine(array_keys($redValues), array_reverse($redValues))); print_r($result);
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Value for `_results` contains invalid data `array`