php变量与数组的相互转换(extract 与 compact)

    //多个变量转数组
    $name='phpff';
    $email='phpff@phpff.com';
    $info=compact('name','email');//传递变量名
    print_r($info);
    /*
    Array
    (
        [name] => phpff
        [email] => phpff@phpff.com
    )
    */
?>

//数组转多个变量
    $capitalcities['England'] = 'London';
    $capitalcities['Scotland'] = 'Edinburgh';
    $capitalcities['Wales'] = 'Cardiff';
    extract($capitalcities);//转变成三个变量 England，Scotland，Wales
    print $Wales;//Cardiff

?>

$my_array = array("a" => "Cat","b" => "Dog", "c" => "Horse");
extract($my_array);
echo "$a = $a; $b = $b; $c = $c";
?>