php 数组转换json有有关问题 大家过来看看

php 数组转换json有问题 大家过来看看

如图：


为什么下面这句话没有输出任何东西？

echo json_encode($result);#输出结果

个人觉得可能是因为$data里面的数组元素为Client对象，在转为json的时候出问题了。但是我不知道是什么问题，怎么转换？或者有没有其他的转换方法？

class Result {<br />		var $state;<br />		var $data = array();<br />	}

完整代码：

$start = 0;
	$end = 2;
	$uid = 1;
	$result = new Result();
	$result_set = getClients($start, $end, $uid);
	$data = array();
	$count = 0;
	
	while($row = mysql_fetch_array($result_set)) {
		$client = new Client();
		$client->cid = $row['id'];
		$client->gender = $row['gender'];
		$client->rank = $row['rank'];
		$client->name = $row['name'];
		$client->phoneNum = $row['phoneNum'];
		$client->email = $row['email'];
		$client->address = $row['address'];
		$result->data[$count] = $client;

		echo $result->data[$count]->cid."  ";
		echo $result->data[$count]->gender."  ";
		echo $result->data[$count]->rank."  ";
		echo $result->data[$count]->name."  ";
		echo $result->data[$count]->phoneNum."  ";
		echo $result->data[$count]->address."\n";

		$count++;
    }

	if(count($data) > 0) {
		$result->state = 0;
	} else {
		$result->state = 1;
	}
	
	echo json_encode($result);#输出结果

	class Result {<br />		var $state;<br />		var $data = array();<br />	}

输出结果：

---------- debug php ----------<br /><br />Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in D:\WWW\wsd\trunk\src\server\api\db\init_db.php on line 10<br /><br />Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in D:\WWW\wsd\trunk\src\server\api\db\init_db.php on line 10<br />3  0  经理  张小莉  18825044888  广东省广州市天河区<br />4  0  主管  吴美凤  18576430777  广东省深圳市南山区蛇口南海大道1079号<br />PHP Deprecated:  mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in D:\WWW\wsd\trunk\src\server\api\db\init_db.php on line 10<br />PHP Deprecated:  mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in D:\WWW\wsd\trunk\src\server\api\db\init_db.php on line 10<br /><br />Output completed (0 sec consumed) - Normal Termination

应该有输出类似这种格式才对的：

{"state":1,<br />"data":[<br />           {"cid":3,<br />          "gender":0,<br />          "rank":"经理"<br />          "name":" 张小莉"<br />          "phoneNum":"18825044888  "<br />          "address":"广东省广州市天河区"},<br />          {"cid":4,<br />          "gender":0,<br />          "rank":"主管"<br />          "name":" 吴美凤"<br />          "phoneNum":"18576430777  "<br />          "address":" 广东省深圳市南山区蛇口南海大道1079号"}<br />          ]<br />}

请问这是什么问题呢？怎么解决？谢谢！





------解决思路----------------------
print_r($result);
能看到什么？
------解决思路----------------------
Object of class Result could not be converted to string 对象不能被转换为字符串
既如此，当然也不能 json 了
看看你的 Client 类定义
------解决思路----------------------
可能没有值吧