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<?php $params = ['add'=>[3434]]; $arr = array_merge(['add'=> [], 'remove' =>[]], $params); var_dump($arr);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["add"]=> array(1) { [0]=> int(3434) } ["remove"]=> array(0) { } }

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