php如何解析json,jsonm_decode有时可以,有时不行

本帖最后由 cnaaa8 于 2013-06-21 09:55:14 编辑

网页编码GB2312(“注意这点，比较重要”),代码如下
当这里关键词为"玻璃移门"时，就无法解析json,但生成的url直接通过浏览器访问就有数据，如果关键词为"手机",就可以正常解析json，file_get_contents得到的数据貌似是utf-8的格式

<?phpprint_r(getKwToData('玻璃移门'));//当这里关键词为"玻璃移门"时，就无法解析json,但生成的url直接通过浏览器访问就有数据，如果关键词为"手机",就可以正常解析jsonfunction getKwToData($kw,$page=1,$condition=''){	if(empty($kw)){		return false;	}	if (preg_match("/^([".chr(228)."-".chr(233)."]{1}[".chr(128)."-".chr(191)."]{1}[".chr(128)."-".chr(191)."]{1}){1}/",$kw) == true || preg_match("/([".chr(228)."-".chr(233)."]{1}[".chr(128)."-".chr(191)."]{1}[".chr(128)."-".chr(191)."]{1}){1}$/",$kw) == true || preg_match("/([".chr(228)."-".chr(233)."]{1}[".chr(128)."-".chr(191)."]{1}[".chr(128)."-".chr(191)."]{1}){2,}/",$kw) != true)	{		$kw=iconv('gbk','utf-8',$kw);	}		$randIp='110.75.71.20';		$url="http://".$randIp."/search_turn_page_iphone.htm?sort=".$condition."&q=".urlencode($kw)."&page=".$page."&showMode=list";		$url=iconv('gbk','utf-8',$url);//生成的url		$data=file_get_contents($url);//这里不管什么关键词都可以获取网页数据			$listItem=json_decode($data);//当这里关键词为"玻璃移门"时，就无法解析json,但生成的url直接通过浏览器访问就有数据，如果关键词为"手机",就可以正常解析json		return $listItem->listItem;}function getLocalIp(){//获得用户ip	if(isset($_SERVER['HTTP_CLIENT_IP'])){			 $ip=$_SERVER['HTTP_CLIENT_IP'];		}elseif(isset($_SERVER['HTTP_X_FORWARDED_FOR'])){			 $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];		}else{			 $ip=$_SERVER['REMOTE_ADDR'];		}	return $ip;}?>

回复讨论(解决方案)

关键词为"玻璃移门"时，echo $data; 是什么值

关键词为"玻璃移门"时，echo $data; 是什么值

echo 的代码如下，代码太多只能贴出部分，由于是手动截取的listItem节点内的格式可能不正确，或者直接访问（http://110.75.71.20/search_turn_page_iphone.htm?sort=&q=%E7%8E%BB%E7%92%83%E7%A7%BB%E9%97%A8&page=1&showMode=list），注意：我php文件编码是gb2312的,echo 出来的数据在浏览器中必须选utf-8才能正常显示，否则是乱码

{"result":"true","totalPage":"100","catmap":"","ppath":"","category":"移门","auctionTagFlag1":"","auctionTagFlag2":"","auctionTagFlag3":"","listItem":[ {"name":"特价吊门。阳台厨房客厅餐厅隔断推拉门，钛合金材质玻璃隔断移门" ,"img":"http://q.i03.wimg.taobao.com/bao/uploaded/i1/10777020696035707/T12ggQXXBXXXXXXXXX_!!0-item_pic.jpg_90x90.jpg","img2":"http://q.i03.wimg.taobao.com/bao/uploaded/i1/10777020696035707/T12ggQXXBXXXXXXXXX_!!0-item_pic.jpg","iswebp":"","url":"http://a.m.taobao.com/i12812086428.htm?rn=54mFXh1-tGoPo1JS2xg7rHCf0C-90rXM9O-Y7hC&sid=aa444833fda20421","previewUrl":"http://a.m.taobao.com/ajax/pre_view.do?itemId=12812086428&sid=aa444833fda20421","favoriteUrl":"http://fav.m.taobao.com/favorite/to_collection.htm?itemNumId=12812086428&sid=aa444833fda20421", "icon":["0" ], "price":"320.00","originalPrice":"320.00","freight":"0","area":"上海","act":"月售12","itemNumId":"12812086428","nick":"特价移门淋浴房阳台", "wwimUrl":"http://im.m.taobao.com/ww/ad_ww_dialog.htm?item_num_id=12812086428&to_user=zNi829LGw8XB3NSht7%2FR9Myo","category":"50022360","isMobileEcard":"false","auctionType":"b" } , {"name":"卫生间隔断门 阳台玻璃推拉门/拼格门 钢化玻璃移门 新店特惠" ,"img":"http://q.i04.wimg.taobao.com/bao/uploaded/i4/11427033313416399/T1aPluXCdcXXXXXXXX_!!0-item_pic.jpg_90x90.jpg","img2":"http://q.i04.wimg.taobao.com/bao/uploaded/i4/11427033313416399/T1aPluXCdcXXXXXXXX_!!0-item_pic.jpg","iswebp":"","url":"http://a.m.taobao.com/i17422447064.htm?rn=54mFXh1-tGoPo1JS2xg7rHCf0C-90rXM9O-Y7hC&sid=aa444833fda20421","previewUrl":"http://a.m.taobao.com/ajax/pre_view.do?itemId=17422447064&sid=aa444833fda20421","favoriteUrl":"http://fav.m.taobao.com/favorite/to_collection.htm?itemNumId=17422447064&sid=aa444833fda20421", "icon":["0" ], "price":"218.02","originalPrice":"298.00","freight":"10","area":"郑州","act":"月售10","itemNumId":"17422447064","nick":"逸品尚家居", "wwimUrl":"http://im.m.taobao.com/ww/ad_ww_dialog.htm?item_num_id=17422447064&to_user=0t3Gt8nQvNK%2B0w%3D%3D","category":"50022360","isMobileEcard":"false","auctionType":"b" }   }

你在json_decode之前将$data做下面的替换工作就可以了

$data = str_replace('\\', '\\\\', $data);

如果不知道为什么这样做，把$data输出的内容放到下面的网址下做个校验就知道了
Just Make JSON Easy!

$s = file_get_contents('http://110.75.71.20/search_turn_page_iphone.htm?sort=&q=%E7%8E%BB%E7%92%83%E7%A7%BB%E9%97%A8&page=1&showMode=list');$s = stripslashes($s);//去掉可能存在的转义$t = json_decode($s, true);//解码成数组array_walk_recursive($t, 'togbk');//因为你需要的是 gbk 编码的，所以要转一下码print_r($t);function togbk(&$item, $key) {  $item = iconv('utf-8', 'gbk', $item);}

Array
(
    [result] => true
    [totalPage] => 100
    [catmap] => 
    [ppath] => 
    [category] => 移门
    [auctionTagFlag1] => 
    [auctionTagFlag2] => 
    [auctionTagFlag3] => 
    [listItem] => Array
        (
            [0] => Array
                (
                    [name] => 特价吊门。阳台厨房客厅餐厅隔断推拉门，钛合金材质玻璃隔断移门
                    [img] => http://q.i03.wimg.taobao.com/bao/uploaded/i1/10777020696035707/T12ggQXXBXXXXXXXXX_!!0-item_pic.jpg_90x90.jpg
                    [img2] => http://q.i03.wimg.taobao.com/bao/uploaded/i1/10777020696035707/T12ggQXXBXXXXXXXXX_!!0-item_pic.jpg
                    [iswebp] => 
                    [url] => http://a.m.taobao.com/i12812086428.htm?rn=X3mFMh1-jGoPuafkFFhChWPExE-ER1xM9O-wi5D&sid=4d5bc9aee02ed3b0
                    [previewUrl] => http://a.m.taobao.com/ajax/pre_view.do?itemId=12812086428&sid=4d5bc9aee02ed3b0
                    [favoriteUrl] => http://fav.m.taobao.com/favorite/to_collection.htm?itemNumId=12812086428&sid=4d5bc9aee02ed3b0
                    [icon] => Array
                        (
                            [0] => 0
                        )

                    [price] => 320.00
                    [originalPrice] => 320.00
                    [freight] => 0
                    [area] => 上海
                    [act] => 月售12
                    [itemNumId] => 12812086428
                    [nick] => 特价移门淋浴房阳台
                    [wwimUrl] => http://im.m.taobao.com/ww/ad_ww_dialog.htm?item_num_id=12812086428&to_user=zNi829LGw8XB3NSht7%2FR9Myo
                    [category] => 50022360
                    [isMobileEcard] => false
                    [auctionType] => b
                )

            [1] => Array
                (
                    [name] => 卫生间隔断门 阳台玻璃推拉门/拼格门 钢化玻璃移门 新店特惠
                    [img] => http://q.i04.wimg.taobao.com/bao/uploaded/i4/11427033313416399/T1aPluXCdcXXXXXXXX_!!0-item_pic.jpg_90x90.jpg
......

你难道不知道json不支持gbk编码么？虽然不会报错也不会出现乱码，但官方已经声明不支持gbk。所以就出现你说的这种情况了。

我来总结一番：
1.json不支持gbk编码；
2.array_walk_recursive($t, 'togbk');//因为你需要的是 gbk 编码的，所以要转一下码

php中json_decode();解析json数据，如果json里有中文数据，是解析不了的。

stripslashes($abc);//去掉可能存在的转义