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<?php $fruits = ['yellow', 'green', 'orange']; $relatedFurites = [ ['yellow'=>'banana', 'green'=>'avacado'], ['yellow'=>'mango', 'green'=> 'chilli'] ]; Foreach($fruits as $color){ $output[$color] = array_column($relatedFurites, $color); } Var_dump($output);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { ["yellow"]=> array(2) { [0]=> string(6) "banana" [1]=> string(5) "mango" } ["green"]=> array(2) { [0]=> string(7) "avacado" [1]=> string(6) "chilli" } ["orange"]=> array(0) { } }

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