在foreach循环中读取返回的JSON到PHP可用数组的问题

Question

我真的不明白我做错了什么。但是对于我来说，我无法在foreach循环中访问JSON字符串中的信息。

这是我的代码。 （json字符串包含任何给定用户的事件列表，用户标识作为user = xxxxxx在URL中传递）。

的直播网址是这里http://livemuzik.co.uk/fb3.php

代码：

include('fb/src/facebook.php'); 

if ($_REQUEST["user"]){ 
$user_id = $_REQUEST["user"]; 
} else $user_id = "me"; 

$app_id = "xxxxxxxxxxx"; 
$app_secret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; 
$my_url = "http://livemuzik.co.uk/fb2.php"; 

$code = $_REQUEST["code"]; 

if(empty($code)) { 
    $auth_url = "http://www.facebook.com/dialog/oauth?client_id=" 
    . $app_id . "&redirect_uri=" . urlencode($my_url) 
    . "&scope=create_event,user_events,friends_events"; 
    echo("<script>top.location.href='" . $auth_url . "'</script>"); 
} 

$token_url = "https://graph.facebook.com/oauth/access_token?client_id=" 
. $app_id . "&redirect_uri=" . urlencode($my_url) 
. "&client_secret=" . $app_secret 
. "&code=" . $code; 
$access_token = file_get_contents($token_url); 

// GET JSON DATA FOR EVENTS 
    $events_url = "https://graph.facebook.com/"; 
    $events_url .= $user_id; 
    $events_url .= '/events?fields=id,owner&limit=100&'; 
    $events_url .= $access_token; 

$json = file_get_contents($events_url,0,null,null); 

var_dump(json_decode($json, true)); 

// foreach(json_decode($json) as $obj) { 
// Need to work out what code to put in here or what else I can do to output the json information as single variable values from an array 
// } 

返回JSON显示如下：

array(2) { 
    ["data"] => array(8) { 
    [0] => array(4) { 
     ["id"] => string(15) "159231904144232" 
     ["owner"] => array(2) { 
     ["name"]=> string(11) "Dean Hurley" 
     ["id"]=> string(10) "1038439076" 
     } 
     ["start_time"]=> string(24) "2011-07-15T04:00:00+0000" 
     ["rsvp_status"]=> string(9) "attending" 
    } 
    [1]=> array(4) { ["id"]=> string(15) "118572044893404" ["owner"]=> array(3) { ["name"]=> string(9) "RAVEOLOGY" ["category"]=> string(13) "Musician/band" ["id"]=> string(10) "8443998018" } ["start_time"]=> string(24) "2011-07-10T04:00:00+0000" ["rsvp_status"]=> string(6) "unsure" } [2]=> array(4) { ["id"]=> string(15) "123371994410260" ["owner"]=> array(3) { ["version"]=> int(1) ["name"]=> string(23) "The Bozeat City Rollers" ["id"]=> string(15) "182725898429985" } ["start_time"]=> string(24) "2011-07-03T04:00:00+0000" ["rsvp_status"]=> string(9) "attending" } [3]=> array(4) { ["id"]=> string(12) "316743171061" ["owner"]=> array(2) { ["name"]=> string(17) "Richard Johnstone" ["id"]=> string(9) "668431151" } ["start_time"]=> string(24) "2011-07-01T23:00:00+0000" ["rsvp_status"]=> string(6) "unsure" } [4]=> array(4) { ["id"]=> string(15) "160599624007096" ["owner"]=> array(2) { ["name"]=> string(11) "Dean Hurley" ["id"]=> string(10) "1038439076" } ["start_time"]=> string(24) "2011-06-15T08:30:00+0000" ["rsvp_status"]=> string(9) "attending" } [5]=> array(4) { ["id"]=> string(15) "231851770163680" ["owner"]=> array(2) { ["name"]=> string(11) "Dean Hurley" ["id"]=> string(10) "1038439076" } ["start_time"]=> string(24) "2011-06-13T08:30:00+0000" ["rsvp_status"]=> string(9) "attending" } [6]=> array(4) { ["id"]=> string(15) "203743706335174" ["owner"]=> array(2) { ["name"]=> string(15) "Bozeat Red Lion" ["id"]=> string(12) "155723533443" } ["start_time"]=> string(24) "2011-06-09T16:00:00+0000" ["rsvp_status"]=> string(9) "attending" } [7]=> array(4) { ["id"]=> string(15) "208151712549353" ["owner"]=> array(3) { ["name"]=> string(20) "Blackbush Promotions" ["category"]=> string(13) "Musician/band" ["id"]=> string(12) "336182297448" } ["start_time"]=> string(24) "2011-06-05T02:30:00+0000" ["rsvp_status"]=> string(6) "unsure" } } ["paging"]=> array(2) { ["previous"]=> string(181) "https://graph.facebook.com/1038439076/events?fields=id%2Cowner&limit=100&access_token=331843765383|b9ef3b78db6a708b1a735347.1-1038439076|DkL44VVbAPlHl8mb03P1WA9VF_o&since=1310702400" ["next"]=> string(181) "https://graph.facebook.com/1038439076/events?fields=id%2Cowner&limit=100&access_token=331843765383|b9ef3b78db6a708b1a735347.1-1038439076|DkL44VVbAPlHl8mb03P1WA9VF_o&until=1307241000" } } 

任何帮助将不胜感激......如果有人找在与Facebook活动有关的类似项目和地方随时与我联系。我很高兴分享我的代码！

我的项目涉及从Joomla Events管理组件同步Facebook和Facebook的事件和地点。

在此先感谢！

Answer 1

这是错误的：

foreach(json_decode($json) as $obj) { 

} 

它应该是：

$json = json_decode($json); 

foreach ($json->data as $data) {  
    echo $data->id . ' ' . htmlspecialchars($data->owner->name); 
} 

Answer 2

你可以尝试像

$json = json_decode($json); 
foreach ($json as $item) { 
    var_dump($item); 
} 

，而不是直接把函数在foreach。

Answer 3

我不明白你的问题是什么：

$events = json_decode($json, true)['data']; 

foreach($events as $event) { 
    echo "Owner: {$event['owner']['name']}, Id: {$event['owner']['id']}"; 
    echo "Start time: {$event['start_time']}"; 
}