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<?php $a = array(99, 95, 101, 102, 103, 98, 97, 110); $number = 100; $diff = []; foreach($a as $ele){ $diff[abs($number - $ele)][] = $ele; } ksort($diff,SORT_NUMERIC); print_r($diff);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [1] => Array ( [0] => 99 [1] => 101 ) [2] => Array ( [0] => 102 [1] => 98 ) [3] => Array ( [0] => 103 [1] => 97 ) [5] => Array ( [0] => 95 ) [10] => Array ( [0] => 110 ) )

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