Question

我尝试使用以下代码在以下网址显示某些json数据中的某些元素，但它不显示任何内容。我有什么想法我做错了吗？

<?php 

$url="http://fbclaurel.onthecity.org/plaza/events?format=json";

$data = file_get_contents($url);
$json = json_decode($data);

foreach($json->"global_event" as $row)
{
    foreach($row as $key => $val)
    {
       echo $key . ': ' . $val;
       echo '<br>';
    }
}

?>

Answer 1

实际上，由于您配置的错误报告/显示设置，您可能会隐藏一个语法错误。它会是这样的

PHP Parse错误：语法错误，意外＆＃39;＆＃34; global_event＆＃34;＆＃39; （T_CONSTANT_ENCAPSED_STRING），期待标识符（T_STRING）或变量（T_VARIABLE）或＆＃39; {＆＃39;或者＆＃39; $＆＃39;

开发时，我建议您始终在php.ini

中拥有以下属性

display_errors = On
error_reporting = E_ALL

更新

我刚刚检查了该API中的数据并返回了一个数组。每个数组条目都是一个具有单个global_event属性的对象，该属性本身就是另一个对象。我想你会需要这样的东西来迭代...

$json = json_decode($data, true);
// the second "true" argument forces an array format result.
// I find it more appropriate when iterate keys or when keys
// might be invalid property names.

foreach ($json as $obj) {
    $globalEvent = $obj['global_event'];

    // now $globalEvent is an array with keys such as
    // addresses, body, created_at, ending_at, etc.
    // Note that few of these properties are simple, scalar values (like strings),
    // most are arrays themselves

    // display example...
    echo 'title: ', htmlspecialchars($globalEvent['title']), '<br>',
         'short_url: ', htmlspecialchars($globalEvent['short_url']), '<br>';
}

Answer 2

如下所示

$url="http://fbclaurel.onthecity.org/plaza/events?format=json";

$data = file_get_contents($url);
$json = json_decode($data);

//echo '<pre>';
//print_r( $json[0]->global_event);

array_walk_recursive($json[0]->global_event, function ($a,$b){

echo 'KEY :'.$b.' & Value :'.$a.'<br>'; 

});

<强> 输出

KEY :starting_at & Value :2014-06-01T08:00:00-04:00
KEY :external_form_id & Value :
KEY :short_url & Value :http://bit.ly/1jOTqao
KEY :body & Value : Hymns are led by piano and organ. The choral music is sung by the Chapel Choir and the sermon message is given by Pastor Stan.  
KEY :ending_at & Value :2014-06-01T09:00:00-04:00
KEY :euid & Value :9ea33765449eb1476530c84d44a01cf200709cf9
KEY :title & Value :Classic Worship Service
KEY :updated_at & Value :2014-05-25T22:28:24-04:00
KEY :created_at & Value :2014-05-25T22:28:23-04:00

来自URL的Json in PHP

2 个答案:

更新