我们如果想做一个资源共享的网站，就离不开json，通过API接口来读取JSON数据信息。那么对于PHP程序开发的网站，PHP怎么通过API接口读取JSON数据呢？

下面是一段PHP通过API接口读取JSON数据的实例代码，（使用WORDPRESS程序开发）供大家使用。（如果不是Wordpress程序，可以使用使用file_get_contents()函数替换wp_remote_retrieve_body( wp_remote_get()函数）

<?php

    $content = wp_remote_retrieve_body( wp_remote_get('http://API接口地址') );

    $content_obj = json_decode($content); #JSON内容转换为PHP对象
     $timer = $content_obj->time;

 $number = $content_obj->number;

 $datar = $content_obj->data;

 echo $timer.'|'.$number.'|'.$datar.'||';
?>

代码介绍：

先是通过WORDPRESS程序自带的wp_remote_retrieve_body函数来获取JSON的内容；
再通过json_decode将JSON内容转换为PHP对象；
最后再输出各个PHP对象里的参数值。

以上是通过PHP获取简单的JSON实例代码。如果是嵌套的JSON数据，就需要使用循环来获取JSON数据。代码如下：

<?php

    $content = wp_remote_retrieve_body( wp_remote_get('http://API接口地址') );

   $content_obj = json_decode($content); #JSON内容转换为PHP对象 
?>
<?php 

foreach ($content_obj as $key => $value) { 
//var_dump($value); 

 $canshu = $value->data;
$shuzhi = $canshu[0];
$gid = $shuzhi->gid; 
$award = $shuzhi->award; 
$time03 = $shuzhi->time; 
$date03 = $shuzhi->date; 
$nextOpenIssue = $shuzhi->nextOpenIssue; 
$nextOpenTime = $shuzhi->nextOpenTime; 
$secondOpenIssue = $shuzhi->secondOpenIssue; 
$secondOpenTime = $shuzhi->secondOpenTime; 
$award_sum = $shuzhi->award_sum; 

echo $gid.'|'.$award.'|'.$time03.'|'.$date03.'|'.$nextOpenIssue.'|'.$nextOpenTime.'|'.$secondOpenIssue.'|'.$award_sum;

} 
?>

如果只想获取嵌套的JSON数据中的第一条，可以这样写：

<?php

    $content = file_get_contents('http://API接口地址');

    var_dump($content);

   $content_obj = json_decode($content); #JSON内容转换为PHP对象
   $dataone = $content_obj->result;

   $datatwo = $dataone->data;

   $datathree= $datatwo[0];


$gid = $datathree->gid;
$award = $datathree->award; 
$time03 = $datathree->time; 
$date03 = $datathree->date; 
$nextOpenIssue = $datathree->nextOpenIssue; 
$nextOpenTime = $datathree->nextOpenTime; 
$secondOpenIssue = $datathree->secondOpenIssue; 
$secondOpenTime = $datathree->secondOpenTime; 
$award_sum = $datathree->award_sum; 

echo $gid.'|'.$award.'|'.$time03.'|'.$date03.'|'.$nextOpenIssue.'|'.$nextOpenTime.'|'.$secondOpenIssue.'|'.$award_sum;

?>