iTunes 搜索商店 api

Question

我想从 API iTunes Store 获取数据到我的 PHP 文件。在搜索表单中，您可以填写艺术家和歌曲名称。我只想显示歌曲中的数据。这是我的代码：

$title = $_POST["title"];
$artist = $_POST["artist"];
$query_string = urlencode($title);
$query_string2 = urlencode($artist);
$json = file_get_contents('https://itunes.apple.com/search?term=$query_string&term=$query_string2'); // this WILL do an http request for you
$data = json_decode($json);

echo "<div class='container' id='movies'>";
echo "<div class='col-md-4' id='movie'>";
echo "<img src='" .$data->artworkUrl60. "' width='200'>";
echo "<h4>" .$data->artistName. " - " .$data->trackName.  "</h4>";

我收到此错误：注意：未定义属性：stdClass::$artworkUrl60 in.... 我的代码有什么问题？

Answer 1

因为您的 $data 对象不包含名为 $artworkUrl60 的属性。您的 HTTP 查询无法正常工作，您应该使用双引号而不是单引号。

// For limit you can add 'limit' parameter
$json = file_get_contents("https://itunes.apple.com/search?term=$query_string&term=$query_string2&limit=20");
// OR concatenation
// $json = file_get_contents('https://itunes.apple.com/search?term='.$query_string.'&term='.$query_string2);
$data = json_decode($json);

if (0 == $data->resultCount) {
    echo 'No result found ! ';
}
else {
    foreach ($data->results as $row){
        echo "<div class='container' id='movies'>";
        echo "<div class='col-md-4' id='movie'>";
        echo "<img src='" .$row->artworkUrl60. "' width='200'>";
        echo "<h4>" .$row->artistName. " - " .$row->trackName.  "</h4>";
    }
}

https://affiliate.itunes.apple.com/resources/documentation/itunes-store-web-service-search-api/#searchexamples

iTunes 搜索商店 api

itunes search store api

api

json

itunes