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<?php $a = ['a' => ['test'=>'good', 'fail'=>'notgood']]; $b = ['a' => ['test'=>'ok'], 'b' => ['4']]; print_r(array_replace_recursive($a,$b));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [a] => Array ( [test] => ok [fail] => notgood ) [b] => Array ( [0] => 4 ) )

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