json_encode()函数输出格式

//对象

class JsonTest{
    public $id = 1;
    public $name = 'terry';
    public $sex = '男';
}

$obj = new JsonTest;
echo json_encode($obj);

//数字索引数组

$arr1 = array(1, 'terry', '男');

echo json_encode($arr1);

//关联数组

$arr2 = array("id" => 1, "name" => 'terry', "sex" => '男');

echo json_encode($arr2);

//多维索引数组

$arr3 = array(array(1, 'terry', '男'), array(2, 'surfin', '男'));

echo json_encode($arr3);

//关联索引数组

$arr4 = array(array("id"=>1, "name"=>'terry', "sex"=>'男'), array("id"=>2, "name"=>'surfin', "sex"=>'男'));

echo json_encode($arr4);