Online PHP editor | refs for 4uQCs

<?php $data = Array ( 0 => Array ( 'entry_id' => 1, 'ic' => 2147483647, 'name' => 'Kořínková Blanka', 'residency' => 'Štětí, Lukešova 354, 411 08', 'file_no' => 'KSUL 77 INS 18898 / 2013', 'detail' => '749371da-725c-4738-8def-2f7167142a6f' ), 1 => Array ( 'entry_id' => 1, 'ic' => 2147483647, 'name' => 'Kořínková Blanka', 'residency' => 'Štětí, Lukešova 354, 411 08', 'file_no' => 'KSUL 77 INS 21218 / 2013', 'detail' => '43b6a718-4647-451d-9c53-50dfee8403ff' ), 2 => Array ( 'entry_id' => 2, 'ic' => 46900217, 'name' => 'ENTEC a.s. "v likvidaci"', 'residency' => 'Staré Město, Brněnská 1916, 686 03', 'file_no' => 'KSBR 28 INS 1232 / 2013', 'detail' => 'e2155a52-c464-4357-b71b-4f4ff75585eb' ) ); $mergeId = 'entry_id'; $data = array_reduce($data, function($c, $x) use ($mergeId) { $c[$x[$mergeId]] = isset($c[$x[$mergeId]]) ?array_combine( $z=array_keys($c[$x[$mergeId]]), array_map(function($y) use ($x, $c, $mergeId) { return in_array($x[$y], (array)$c[$x[$mergeId]][$y]) ?$c[$x[$mergeId]][$y] :array_merge((array)$c[$x[$mergeId]][$y], [$x[$y]]); }, $z) ) :$x; return $c; }, []); var_dump($data);