JSON子数组-PHP解码

Question

I have a JSON feed and within the feed, there is an array inside the feed, I can output everything above the array correctly.

JSON feed output: http://pastebin.com/pxiFVm1d

Code used to output:

$jsonurl = "LINK to feed";
$json = file_get_contents($jsonurl,0,null,null);
$json_output = json_decode($json);

foreach ( $json_output->results as $results )
{
    echo "{$results->name}.<br />";
}

How do I output the photo_rerence which is part of the array (see pastebin)?

Answer 1

If there's the possibility that there might be multiple photos you could do:

$json_output = json_decode($json);
foreach ( $json_output->results as $results )
{
    foreach($results->photos as $photo) {
        echo $photo->photo_reference;
    }
}

Or if you only ever want to grab from the first one in the array just do:

$json_output = json_decode($json);
foreach ( $json_output->results as $results )
{
   echo $results->photos[0]->photo_reference;
}

Answer 2

您可以做一个“深度选择”： $results['photos']['photo_reference'] ，或者看看phps array_walk()函数，该函数允许您以递归方式“搜索”整个数组。

Answer 3

Just to add to what arkascha said, if you want to use it as an array, you will need to add the second param on your json_decode:

$json_output = json_decode($json, TRUE); 

Refer to php.net/json_decode for details.