从Json数组中检索值

我很难从Json数组中检索值。我有一个使用json_encode创建的Json数据集。这是怎么出现使用json_decode并显示使用print_r的经过：从Json数组中检索值

Array ([0] => stdClass Object ([postID] => 1961 [postTitle] => Kiss My Fairy [previewThumb] => 2011/09/Kiss-My-Fairy-Ibiza-essentialibiza-2011_feature.jpg [blogContent] => Ibiza has always had a flair for the extravagant, inhibitions are checked in at the airport when the floods of tourists arrive and the locals have embraced a freedom of partying that has turned the quiet Mediterranean island into the Mecca...)) a_post_data_array = 1

是实现这一功能的代码如下：

$post_data_URL = "http://myurl.com/news/scrape/facebook-like-chart-ID.php?post_name=kiss-my-fairy"; 

$post_data_response = file_get_contents($post_data_URL); 

$a_post_data_array=json_decode($post_data_response);

我现在只是需要从该数组检索一些值用作变量。该数组将只有一组值。我正在使用下面的代码，但它不起作用。

echo "**** -- " . $a_post_data_array[post_title] . "<br>";

任何人都可以请帮忙吗？对不起，这是如此基本。我一直在网上搜索，但找不到任何这方面的例子。

来源

2011-09-27 Jason Eyebe

有你的代码中的多个问题：

首先，你应该指示json_decode给你$data = json_decode($response, TRUE);
纯数组，那么结果数组是一个列表，你必须访问第一个元素为$data[0]
您要访问的条目具有密钥postTitle，而不是post_title，如示例代码所示。（除非这是预定的常数，将无法正常工作。）
而你需要把这些数组键加引号，像print $data[0]["postTitle"];

调高你的error_reporting水平有所发展的帮助。

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2011-09-27 13:23:07 mario

谢谢你这么多马里奥。将采取您的意见:) –

echo "** -- " . $a_post_data_array[0]['post_title'];

来源

2011-09-27 13:17:47

试试这个PHP代码：

//$post_data_response = file_get_contents("https://raw.github.com/gist/1245028/80e690bcbe6f1c5b46676547fbd396ebba97339b/Person_John.json"); 
//$PersonObject = json_decode($post_data_response); 

// Get Person Object from JSON Source 
$PersonObject = json_decode('{"ID":"39CA2939-38C0-4C4E-AE6C-CFA5172B8CEB","lastname":"Doe","firstname":"John","age":25,"hobbies":["reading","cinema",{"sports":["volley-ball","snowboard"]}],"address":{}}'); 

// Get data from Object 
echo "Person ID => $PersonObject->ID<br>"; 
echo "Person Name => $PersonObject->firstname<br>"; 
echo "Person Lastname => $PersonObject->lastname<br>"; 
echo "Person Age => $PersonObject->age<br>"; 
echo "Person Hobbies => " . $PersonObject->hobbies[0] . "<br>";

来源

2011-09-27 13:43:05

请参阅完整的PHP代码在URL https://gist.github.com/1245070 –

从Json数组中检索值

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