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<?php $arr = Array ( '0' => Array ( 'number' => 2, 'name' => 'ABC' ), '1' => Array ( 'number' => 3, 'name' => 'ABC' ), '2' => Array ( 'number' => 1, 'name' => 'XYZ' ), '3' => Array ( 'number' => 2, 'name' => 'XYZ' ) ); $res = []; array_map(function($v) use (&$res){ array_key_exists($v['name'], $res) ? ($res[$v['name']]['number'] = $res[$v['name']]['number'].','.$v['number']) : ($res[$v['name']] = ['number' => $v['number'],'name' => $v['name']]) ; }, $arr); $res = array_values($res); echo '<pre>'; print_r($res);
Output for git.master, git.master_jit, rfc.property-hooks
<pre>Array ( [0] => Array ( [number] => 2,3 [name] => ABC ) [1] => Array ( [number] => 1,2 [name] => XYZ ) )

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