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<?php $merged = [ '1' => '2', '2' => '3', '4' => '1', '5' => '2' ]; $aliasesReduced = false; while(!$aliasesReduced) { $aliasesReduced = true; foreach($merged as $originalId => &$mergedId) { if (array_key_exists($mergedId, $merged)) { $mergedId = $merged[$mergedId]; $aliasesReduced = false; } } } print_r($merged);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [1] => 3 [2] => 3 [4] => 3 [5] => 3 )

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