在php中回显数组的特定部分

Question

我还在学习 php 数组，我正在尝试回显一个

array(8) { [0]=> string(9) "site_name" [1]=> string(3) "url" [2]=> string(5) "title" [3]=> string(11) "description" [4]=> string(4) "type" [5]=> string(5) "image" [6]=> string(11) "image:width" [7]=> string(12) "image:height" } NULL site_name => Playbuzzurl => http://www.playbuzz.com/jordonr10/what-modern-societal-archetype-fits-your-personalitytitle => What Modern Societal Archetype Fits Your Personality?description => It's 2017, so it's about time we update the books!type => articleimage => http://cdn.playbuzz.com/cdn/aef166e1-1574-4d57-9823-3f38f30bcfc4/810f1d3e-0a97-4797-8235-b4c988562a1c.jpgimage:width => 1600image:height => 842

array(8) { [0]=> string(9) "site_name" [1]=> string(3) "url" [2]=> 字符串（5）“标题”[3]=>字符串（11）“描述”[4]=>字符串（4） “类型”[5]=> 字符串（5）“图像”[6]=> 字符串（11）“图像：宽度”[7]=> 字符串（12）“图像：高度”} NULL 站点名称 => Playbuzzurl => http://www.playbuzz.com/jordonr10/what-modern-societal-archetype-fits-your-personalitytitle => 什么样的现代社会原型适合你的个性？说明 => 现在是 2017 年，是时候更新书籍了！type => articleimage => http://cdn.playbuzz.com/cdn/aef166e1-1574-4d57-9823-3f38f30bcfc4/810f1d3e-0a97-4797-8235-b4c988562a1c.jpgimage:width => 1600 图像：高度 => 842

我试图回显description 的值，即It's 2017, so it's about time we update the books!

我尝试了几种不同的方法，但没有任何效果。非常感谢任何帮助。

echo $array[0]['description'];      // returns nothing
var_dump($key);                     // returns string(12) "image:height"

当前代码

<?php
require_once('OpenGraph.php');

$graph = OpenGraph::fetch('http://www.playbuzz.com/jordonr10/what-modern-societal-archetype-fits-your-personality');
var_dump($graph->keys());
var_dump($graph->schema);

foreach ($graph as $key => $value) {
    echo "$key => $value<br><hr>";
}
echo "Value Below<hr>";
echo $array['description'];

?>

Answer 1

从您的代码看来，如果密钥已经存在，您可以直接从$graph 获取描述值。 你也想在这里显示$array['description']; 我可以看到 $array 是在任何地方定义的

尝试

 echo $graph['description']; // if $graph is array

或

echo $graph->description; // If its an object

Answer 2

只要打电话

echo $array[3];

或者使用可以调用的关联数组

echo $array['description'];

http://php.net/manual/en/language.types.array.php