$options = array(

    'config' => array(

        'aaa' => 111,

        'bbb' => 222,

    ),

    'headers' => array(

        'Content-Type' => 'application/json;charset=utf-8'

    ),

    'params' => array(

        'p1' => 'hello',

        'p2' => 'world',

    ),

    'signOptions' => array(

        'ccc' => '333',

    ),

);

list($config,$headers,$params,$signOptions) = parseOptions($options,'config','headers','params','signOptions');

echo '<pre>';

print_r($config);

echo '<br>';

print_r($headers);

echo '<br>';

print_r($params);

echo '<br>';

print_r($signOptions);

echo '<br>';

function parseOptions(array $options) {

    return doParseOptions($options,array_slice(func_get_args(), 1),false);

}

function doParseOptions(array $options,array $args,$allowExtraOptions) {

    $result = array();

    foreach ($args as $arg) {

        if (isset($options[$arg])) {

            $result[] = $options[$arg];

            unset($options[$arg]);

        } else {

            $result[] = null;

        }

    }

    if (!$allowExtraOptions && count($options) > 0) {

        throw new \InvalidArgumentException(

            'Unexpected options:' . implode(',', array_keys($options))

            . ' Acceptable options are:' . implode(',', $args)

        );

    }

    return $result;

}

Array

(

    [aaa] => 111

    [bbb] => 222

)

Array

(

    [Content-Type] => application/json;charset=utf-8

)

Array

(

    [p1] => hello

    [p2] => world

)

Array

(

    [ccc] => 333

)

php中的元组，获取参数列表函数