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<?php $d = [ ['foo' => 1, 'bar' => 2], ['foo' => 1, 'bar' => 3], ['foo' => 2, 'bar' => 4] ]; $result = array_values(array_merge(...array_map(fn($v) => [array_key_first($v). '|'. $v[array_key_first($v)] => $v], $d))); print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [foo] => 1 [bar] => 3 ) [1] => Array ( [foo] => 2 [bar] => 4 ) )

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