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run code in 200+ php & hhvm versions
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<?php $input = Array( Array ( 'css' => 'teste' ), Array ( 'css' => 'teste2' ) ); $result = call_user_func_array("array_merge", $input); var_export($result);
Output for 4.3.0 - 7.2.0
array ( 'css' => 'teste2', )