<?php $array = [ ['ref' => 'Q1'], ['ref' => 'C6'], ['ref' => 'C13'], ['ref' => 'S3'], ['ref' => 'Q11'], 8 => ['ref' => 'S7'], 9 => ['ref' => 'C4'], ]; $map = array_flip( ['S', 'Q', 'D', 'C', 'P', 'E'] ); foreach ($array as $keys[] => ['ref' => $v]) { sscanf($v, '%1s%d', $letter, $integers[]); $priorities[] = $map[$letter]; } array_multisort( $priorities, $integers, $array ); var_export(array_combine($keys, $array));
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