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<?php $a = ['a' => '123', 'b' => '321', 'c' => ['asdf' => 'asdf']]; $b = ['a' => '123', 'b' => '123', 'c' => ['asdf' => 'asdf123']]; $r = array_udiff_assoc($a, $b, function($old, $new) { var_dump($old, $new); return $new == $old ? 0 : -1; }); var_dump($r);
Output for git.master, git.master_jit, rfc.property-hooks
string(3) "123" string(3) "123" string(3) "321" string(3) "123" array(1) { ["asdf"]=> string(4) "asdf" } array(1) { ["asdf"]=> string(7) "asdf123" } array(2) { ["b"]=> string(3) "321" ["c"]=> array(1) { ["asdf"]=> string(4) "asdf" } }

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