$json的内容大概是这样的：
{pagination:{},meta:{code:200},data:[{attribution:null,tags:[],type:image,location:null,comments:{count:0},filter:normal,created_time:1453516817,link:https:\/\/www.instagram.com\/p\/ba3xjwmp4ye\/,likes:{count:0},images:{low_resolution:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpf1\/t51.2885-15\/s320x320\/e35\/12547507_218933238449715_1618422633_n.jpg,width:320,height:320},thumbnail:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpf1\/t51.2885-15\/s150x150\/e35\/12547507_218933238449715_1618422633_n.jpg,width:150,height:150},standard_resolution:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpf1\/t51.2885-15\/s640x640\/sh0.08\/e35\/12547507_218933238449715_1618422633_n.jpg,width:640,height:640}},users_in_photo:[],caption:null,user_has_liked:false,id:1168506212405185694_2231334066,user:{username:misery,profile_picture:https:\/\/scontent.cdninstagram.com\/hphotos-xta1\/t51.2885-19\/10684024_538087799681202_2023427205_a.jpg,id:2231334066,full_name:misery}},{attribution:null,tags:[],type:image,location:null,comments:{count:0},filter:hefe,created_time:1444533784,link:https:\/\/www.instagram.com\/p\/8rpxxov48o\/,likes:{count:2},images:{low_resolution:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpt1\/t51.2885-15\/s320x320\/e35\/11910259_421481191371212_1146964092_n.jpg,width:320,height:320},thumbnail:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpt1\/t51.2885-15\/s150x150\/e35\/11910259_421481191371212_1146964092_n.jpg,width:150,height:150},standard_resolution:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpt1\/t51.2885-15\/s640x640\/sh0.08\/e35\/11910259_421481191371212_1146964092_n.jpg,width:640,height:640}},users_in_photo:[],caption:null,user_has_liked:false,id:1093151075025784616_2231334066,user:{username:misery,profile_picture:https:\/\/scontent.cdninstagram.com\/hphotos-xta1\/t51.2885-19\/10684024_538087799681202_2023427205_a.jpg,id:2231334066,full_name:misery}}]}

回复内容：

$json的内容大概是这样的：
{pagination:{},meta:{code:200},data:[{attribution:null,tags:[],type:image,location:null,comments:{count:0},filter:normal,created_time:1453516817,link:https:\/\/www.instagram.com\/p\/ba3xjwmp4ye\/,likes:{count:0},images:{low_resolution:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpf1\/t51.2885-15\/s320x320\/e35\/12547507_218933238449715_1618422633_n.jpg,width:320,height:320},thumbnail:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpf1\/t51.2885-15\/s150x150\/e35\/12547507_218933238449715_1618422633_n.jpg,width:150,height:150},standard_resolution:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpf1\/t51.2885-15\/s640x640\/sh0.08\/e35\/12547507_218933238449715_1618422633_n.jpg,width:640,height:640}},users_in_photo:[],caption:null,user_has_liked:false,id:1168506212405185694_2231334066,user:{username:misery,profile_picture:https:\/\/scontent.cdninstagram.com\/hphotos-xta1\/t51.2885-19\/10684024_538087799681202_2023427205_a.jpg,id:2231334066,full_name:misery}},{attribution:null,tags:[],type:image,location:null,comments:{count:0},filter:hefe,created_time:1444533784,link:https:\/\/www.instagram.com\/p\/8rpxxov48o\/,likes:{count:2},images:{low_resolution:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpt1\/t51.2885-15\/s320x320\/e35\/11910259_421481191371212_1146964092_n.jpg,width:320,height:320},thumbnail:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpt1\/t51.2885-15\/s150x150\/e35\/11910259_421481191371212_1146964092_n.jpg,width:150,height:150},standard_resolution:{url:https:\/\/scontent.cdninstagram.com\/hphotos-xpt1\/t51.2885-15\/s640x640\/sh0.08\/e35\/11910259_421481191371212_1146964092_n.jpg,width:640,height:640}},users_in_photo:[],caption:null,user_has_liked:false,id:1093151075025784616_2231334066,user:{username:misery,profile_picture:https:\/\/scontent.cdninstagram.com\/hphotos-xta1\/t51.2885-19\/10684024_538087799681202_2023427205_a.jpg,id:2231334066,full_name:misery}}]}

转义而已,对自己问题的补充修改问题详情即可,不要发表在回答区域
data;foreach($data as $row){ echo $row->images->standard_resolution->url.
;}
你只用了json_decode来解码,但是输出的时候并没有json_encode啊。 输出的应该只是一堆字符串吧？ \是用来转移字符的. \/ 其实输出以后就是/