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<?php $users = array( "name one"=>"-11", "name two"=>"5.5", "name three"=>"8", "name four"=>"7", "name five"=>"9", "name six"=>"12"); asort($users); $keys = array_keys($users); if(end($users) + $users[$keys[0]] < $users[$keys[1]]-$users[$keys[0]]){ $new[0][$keys[0]] = array_splice($users,0,1); $new[0][end($keys)] = array_splice($users,-1); } $new = array_merge($new, array_chunk($users,2,true)); var_dump($new);

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