我正在尝试为我正在构建的应用程序解析一些JSON数据，但我似乎无法让它工作。我之前使用过这段代码，但它不适用于此API。这是我的代码。
{
"meta":{
"status":200
},
"response":{
"song":{
"annotation_count":24,
"api_path":"/songs/222926",
"description":{
"dom":{
"tag":"root",
"children":[
{
"tag":"p",
"children":[
"As the debut UK single from ",
{
"tag":"a",
"attributes":{
"href":"http://genius.com/artists/The-vamps"
},
"data":{
"api_path":"/artists/72916"
},
"children":[
"The Vamps"
]
},
", “Can We Dance?” introduces audiences to the group’s fun, catchy sound. The song was featured on the band’s debut album, appropriately named ",
{
"tag":"a",
"attributes":{
"href":"http://genius.com/albums/the-vamps/meet-the-vamps"
},
"data":{
"api_path":"/albums/94381"
},
"children":[
{
"tag":"em",
"children":[
"Meet The Vamps"
]
},
","
]
},
" and was released September 29th, 2013 in the boys' native United Kingdom."
]
},
"",
{
"tag":"p",
"children":[
"In the song, Brad, James, Connor, and Tristan find themselves at a party and are drawn to one particular girl. They’re desperate for their crush to notice them, and use the party as an excuse to flirt, being that they’re drunk and could easily ask her to dance."
]
}
]
}
},
"embed_content":"<div id='rg_embed_link_222926' class='rg_embed_link' data-song-id='222926'>Read <a href='http://genius.com/The-vamps-can-we-dance-lyrics'>“Can We Dance?” by The Vamps</a> on Genius</div> <script crossorigin src='//genius.com/songs/222926/embed.js'></script>",
"featured_video":false,
"full_title":"Can We Dance? by The Vamps",
"header_image_thumbnail_url":"https://images.genius.com/b3a99070078ce4c6d98fc3dc5ebdacb9.300x300x1.jpg",
"header_image_url":"https://images.genius.com/b3a99070078ce4c6d98fc3dc5ebdacb9.618x617x1.jpg",
"id":222926,
"media":[
{
"type":"audio",
"provider":"spotify",
"url":"https://open.spotify.com/track/5plDUEEu4r5YEzHL8IhOs1",
"native_uri":"spotify:track:5plDUEEu4r5YEzHL8IhOs1"
},
{
"type":"video",
"provider":"youtube",
"url":"http://www.youtube.com/watch?v=UqSww10eeKw",
"start":8
}
],
"path":"/The-vamps-can-we-dance-lyrics",
"pyongs_count":18,
"recording_location":null,
"release_date":null,
"song_art_image_url":"https://images.genius.com/b3a99070078ce4c6d98fc3dc5ebdacb9.618x617x1.jpg",
"stats":{
"accepted_annotations":1,
"contributors":13,
"hot":false,
"iq_earners":13,
"pageviews":10990,
"transcribers":1,
"unreviewed_annotations":22,
"verified_annotations":0
},
"title":"Can We Dance?",
"url":"http://genius.com/The-vamps-can-we-dance-lyrics",
"current_user_metadata":{
"interactions":{
"pyong":false,
"following":false
},
"relationships":{
},
"permissions":[
"see_pageviews",
"create_comment"
]
},
"album":{
"api_path":"/albums/94381",
"cover_art_url":"https://images.genius.com/b3a99070078ce4c6d98fc3dc5ebdacb9.618x617x1.jpg",
"id":94381,
"name":"Meet The Vamps",
"url":"http://genius.com/albums/The-vamps/Meet-the-vamps",
"artist":{
"api_path":"/artists/72916",
"header_image_url":"https://images.genius.com/4575ab8cdc593ab6d4427716b28bda13.525x350x1.jpg",
"id":72916,
"image_url":"https://images.genius.com/4575ab8cdc593ab6d4427716b28bda13.525x350x1.jpg",
"is_verified":false,
"name":"The Vamps",
"url":"http://genius.com/artists/The-vamps"
}
},
"custom_performances":[
],
"description_annotation":{
"_type":"referent",
"annotator_id":1620931,
"annotator_login":"BTMN_Gaming",
"api_path":"/referents/3664740",
"classification":"accepted",
"fragment":"Can We Dance?",
"id":3664740,
"is_description":true,
"path":"/3664740/The-vamps-can-we-dance/Can-we-dance",
"range":{
"content":"Can We Dance?"
},
"song_id":222926,
"url":"http://genius.com/3664740/The-vamps-can-we-dance/Can-we-dance",
"verified_annotator_ids":[
],
"annotatable":{
"api_path":"/songs/222926",
"client_timestamps":{
"updated_by_human_at":1464755813,
"lyrics_updated_at":1464755813
},
"context":"The Vamps",
"id":222926,
"image_url":"https://images.genius.com/b3a99070078ce4c6d98fc3dc5ebdacb9.618x617x1.jpg",
"link_title":"Can We Dance? by The Vamps",
"title":"Can We Dance?",
"type":"Song",
"url":"http://genius.com/The-vamps-can-we-dance-lyrics"
},
"annotations":[
{
"api_path":"/annotations/3664740",
"body":{
"dom":{
"tag":"root",
"children":[
{
"tag":"p",
"children":[
"As the debut UK single from ",
{
"tag":"a",
"attributes":{
"href":"http://genius.com/artists/The-vamps"
},
"data":{
"api_path":"/artists/72916"
},
"children":[
"The Vamps"
]
},
", “Can We Dance?” introduces audiences to the group’s fun, catchy sound. The song was featured on the band’s debut album, appropriately named ",
{
"tag":"a",
"attributes":{
"href":"http://genius.com/albums/the-vamps/meet-the-vamps"
},
"data":{
"api_path":"/albums/94381"
},
"children":[
{
"tag":"em",
"children":[
"Meet The Vamps"
]
},
","
]
},
" and was released September 29th, 2013 in the boys' native United Kingdom."
]
},
"",
{
"tag":"p",
"children":[
"In the song, Brad, James, Connor, and Tristan find themselves at a party and are drawn to one particular girl. They’re desperate for their crush to notice them, and use the party as an excuse to flirt, being that they’re drunk and could easily ask her to dance."
]
}
]
}
},
"comment_count":0,
"community":true,
"id":3664740,
"pinned":false,
"share_url":"http://genius.com/3664740",
"state":"accepted",
"url":"http://genius.com/3664740/The-vamps-can-we-dance/Can-we-dance",
"verified":false,
"verified?":false,
"votes_total":2,
"current_user_metadata":{
"interactions":{
"vote":null,
"cosign":false,
"pyong":false
},
"permissions":[
"create_comment"
]
},
"authors":[
{
"attribution":0.9484536082474228,
"pinned_role":null,
"user":{
"api_path":"/users/1873201",
"avatar":{
"tiny":{
"url":"https://images.rapgenius.com/avatars/tiny/35d9463bfb54e2d3d9fb261fc6ef2174",
"bounding_box":{
"width":16,
"height":16
}
},
"thumb":{
"url":"https://images.rapgenius.com/avatars/thumb/35d9463bfb54e2d3d9fb261fc6ef2174",
"bounding_box":{
"width":32,
"height":32
}
},
"small":{
"url":"https://images.rapgenius.com/avatars/small/35d9463bfb54e2d3d9fb261fc6ef2174",
"bounding_box":{
"width":100,
"height":100
}
},
"medium":{
"url":"https://images.rapgenius.com/avatars/medium/35d9463bfb54e2d3d9fb261fc6ef2174",
"bounding_box":{
"width":300,
"height":400
}
}
},
"header_image_url":"https://images.rapgenius.com/avatars/medium/35d9463bfb54e2d3d9fb261fc6ef2174",
"human_readable_role_for_display":"Editor",
"id":1873201,
"iq":18561,
"login":"VinylKilljoy_MCR",
"name":"VinylZombie_MCR",
"role_for_display":"editor",
"url":"http://genius.com/VinylKilljoy_MCR"
}
},
{
"attribution":0.051546391752577324,
"pinned_role":null,
"user":{
"api_path":"/users/1620931",
"avatar":{
"tiny":{
"url":"https://assets.genius.com/images/default_avatar_16.png?1465401450",
"bounding_box":{
"width":16,
"height":16
}
},
"thumb":{
"url":"https://assets.genius.com/images/default_avatar_32.png?1465401450",
"bounding_box":{
"width":32,
"height":32
}
},
"small":{
"url":"https://assets.genius.com/images/default_avatar_100.png?1465401450",
"bounding_box":{
"width":100,
"height":100
}
},
"medium":{
"url":"https://assets.genius.com/images/default_avatar_300.png?1465401450",
"bounding_box":{
"width":300,
"height":400
}
}
},
"header_image_url":"https://assets.genius.com/images/default_avatar_300.png?1465401450",
"human_readable_role_for_display":null,
"id":1620931,
"iq":38,
"login":"BTMN_Gaming",
"name":"BTMN_Gaming",
"role_for_display":null,
"url":"http://genius.com/BTMN_Gaming"
}
}
],
"cosigned_by":[
],
"verified_by":null
}
]
},
"featured_artists":[
],
"primary_artist":{
"api_path":"/artists/72916",
"header_image_url":"https://images.genius.com/4575ab8cdc593ab6d4427716b28bda13.525x350x1.jpg",
"id":72916,
"image_url":"https://images.genius.com/4575ab8cdc593ab6d4427716b28bda13.525x350x1.jpg",
"is_verified":false,
"name":"The Vamps",
"url":"http://genius.com/artists/The-vamps"
},
"producer_artists":[
],
"song_relationships":[
{
"type":"samples",
"songs":[
]
},
{
"type":"sampled_in",
"songs":[
]
},
{
"type":"interpolates",
"songs":[
]
},
{
"type":"interpolated_by",
"songs":[
]
},
{
"type":"cover_of",
"songs":[
]
},
{
"type":"covered_by",
"songs":[
]
},
{
"type":"remix_of",
"songs":[
]
},
{
"type":"remixed_by",
"songs":[
]
},
{
"type":"live_version_of",
"songs":[
]
},
{
"type":"performed_live_as",
"songs":[
]
}
],
"verified_annotations_by":[
],
"verified_lyrics_by":[
],
"writer_artists":[
]
}
}
}
我在问题的最后引用了JSON。它根据http://jsonlint.com有效。
我也尝试过使用这段代码，但没有运气。
do.call(rbind, lapply())我确定它很小，但我无法理解。
这是JSON：
df1 <- data.frame(x1 = rnorm(10), x2 = rnorm(10), x3 = rnorm(10))
df2 <- data.frame(x1 = rnorm(10, 5), x2 = rnorm(10), x3 = rnorm(10))
getp <- function(var) {
return(t.test(df1[, var], df2[, var])$p.value)
}
list <- c('x1', 'x2', 'x3')
ps <- do.call(rbind, lapply(list, getp))
ps
[,1]
[1,] 6.232025e-09
[2,] 2.128019e-09
[3,] 5.824713e-08
答案 0 :(得分：1)
您可以先尝试循环访问数据，因为数据结构比使用$ songs [0]访问要复杂得多。试试这个：
<?php
$link = "http://api.genius.com/songs/542383?access_token=HOlDPArpVrb8ljFKUN6FyBjSG--hb0QHv9qFEccs2gNdCr62W0pJuikv1RoCASgY";
$json = file_get_contents($link);
$obj = json_decode($json);
$arrChildren = $obj->response->song->description->dom->children;
foreach($arrChildren as $strKey=>$objData){
if (isset($objData->children) && @is_string($objData->children)) {
echo $objData->children . "<br />";
}else if (isset($objData->children) && is_array($objData->children)) {
foreach ($objData->children as $iKey => $objNested) {
if (is_string($objNested)) {
echo $objNested . "<br />";
}
else {
if (is_object($objNested)) {
var_dump($objNested);
echo "<br /><br />";
}
}
}
}
}
var_dump($arrChildren);
<强>输出：
Taylor Swift unveiled a little snippet of this song in her new Diet Coke ad.
object(stdClass)[7]
public 'tag' => string 'a' (length=1)
public 'attributes' =>
object(stdClass)[8]
public 'href' => string 'https://twitter.com/taylorswift13/status/522413036729298944' (length=59)
public 'rel' => string 'nofollow' (length=8)
public 'children' =>
array (size=1)
0 => string 'https://twitter.com/taylorswift13/status/522413036729298944' (length=59)
The song works as an advice to a guy who wants to get a girl back. She suggests better tactics than the ones her former lovers seemed to have used on her, described in songs like
object(stdClass)[10]
public 'tag' => string 'a' (length=1)
public 'attributes' =>
object(stdClass)[11]
public 'href' => string 'http://genius.com/Taylor-swift-we-are-never-ever-getting-back-together-lyrics' (length=77)
public 'data' =>
object(stdClass)[12]
public 'api_path' => string '/songs/84880' (length=12)
public 'children' =>
array (size=1)
0 => string '“We Are Never Ever Getting Back Together”' (length=45)
.
array (size=5)
0 =>
object(stdClass)[5]
public 'tag' => string 'p' (length=1)
public 'children' =>
array (size=1)
0 => string 'Taylor Swift unveiled a little snippet of this song in her new Diet Coke ad.' (length=76)
1 => string '' (length=0)
2 =>
object(stdClass)[6]
public 'tag' => string 'p' (length=1)
public 'children' =>
array (size=1)
0 =>
object(stdClass)[7]
...
3 => string '' (length=0)
4 =>
object(stdClass)[9]
public 'tag' => string 'p' (length=1)
public 'children' =>
array (size=3)
0 => string 'The song works as an advice to a guy who wants to get a girl back. She suggests better tactics than the ones her former lovers seemed to have used on her, described in songs like ' (length=179)
1 =>
object(stdClass)[10]
...
2 => string '.' (length=1)
答案 1 :(得分：0)
使用时检查第4行：
echo $row['description']['children'];
一定是
echo $item['description']['children'];