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<?php function getPairs($array) { $n = count($array); $finalArray = []; $i = 0; foreach ($array as $a) { for ($x = $n-1; $i < $x; $x--) { $key1 = array_keys($array)[$i]; $key2 = array_keys($array)[$x]; $finalArray[$key1.$key2] = [$array[$key1], $array[$key2]]; } $i++; } return $finalArray; } $arr1 = 'arr1'; $arr2 = 'arr2'; $arr3 = 'arr3'; $merged = [ 'a'=> $arr1, 'b'=> $arr2, 'c'=> $arr3 ]; $pairs = getPairs($merged); print_r($pairs);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [ac] => Array ( [0] => arr1 [1] => arr3 ) [ab] => Array ( [0] => arr1 [1] => arr2 ) [bc] => Array ( [0] => arr2 [1] => arr3 ) )

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