摘要： 对于数组$foo = array( "a" => array('a1' => 1, 'a2' => 2), "b" => array()); 想转换成{ "a": {"a1":1, "a2":2}, "b": {}} 默认情况下用json_encode($foo)得到的是 { "a": {"a1": 阅读全文