从Wordpress中的wp_remote_get访问JSON

Question

我试图使用wp_remote_get访问从此Google books API请求返回的json，但它不输出数据。谁能告诉我问题是什么？

$request = wp_remote_get('https://books.google.com/books?bibkeys=9780001955073%2C%209780001982116%2C%209780001981768&jscmd=viewapi&callback=listisbns'); 

$body = wp_remote_retrieve_body($request); 
$data = json_decode($body); 

foreach($data as $book) { 
    echo $book->info_url; 
} 

Answer 1

如果你是通过回调函数listisbns使用JavaScript，在PHP中使用返回的结果你得收拾返回的字符串这将是确定的：

$body = wp_remote_retrieve_body($request); 

# clean start removing "listisbns(" 
$body = str_replace('listisbns(', '', $body); 

# clean end removing last two characters: ");" 
$body = substr($body, 0, strlen($body) - 2); 

# data ok to proceed 
$data = json_decode($body);