<?php
$string= '{
"resultCount": 1,
"results": [
{
"wrapperType": "track",
"kind": "song",
"artistId": 376346300,
"collectionId": 566534668,
"trackId": 566534690,
"artistName": "Sing2Piano",
"collectionName": "Diamonds (Originally Performed By Rihanna) [Piano Karaoke Version] - Single",
"trackName": "Diamonds (Originally Performed By Rihanna) [Piano Karaoke Version]",
"collectionCensoredName": "Diamonds (Originally Performed By Rihanna) [Piano Karaoke Version] - Single",
"trackCensoredName": "Diamonds (Originally Performed By Rihanna) [Piano Karaoke Version]",
"artistViewUrl": "https://itunes.apple.com/gb/artist/sing2piano/id376346300?uo=4",
"collectionViewUrl": "https://itunes.apple.com/gb/album/diamonds-originally-performed/id566534668?i=566534690&uo=4",
"trackViewUrl": "https://itunes.apple.com/gb/album/diamonds-originally-performed/id566534668?i=566534690&uo=4",
"previewUrl": "http://a1061.phobos.apple.com/us/r30/Music/d5/65/b3/mzi.tloonito.aac.p.m4a",
"artworkUrl30": "http://is1.mzstatic.com/image/pf/us/r30/Music/v4/31/4a/86/314a8696-286a-b580-3860-ed3cccb1ceb9/791090427418.30x30-50.jpg",
"artworkUrl60": "http://is5.mzstatic.com/image/pf/us/r30/Music/v4/31/4a/86/314a8696-286a-b580-3860-ed3cccb1ceb9/791090427418.60x60-50.jpg",
"artworkUrl100": "http://is1.mzstatic.com/image/pf/us/r30/Music/v4/31/4a/86/314a8696-286a-b580-3860-ed3cccb1ceb9/791090427418.100x100-75.jpg",
"collectionPrice": 0.79,
"trackPrice": 0.79,
"releaseDate": "2012-09-26T07:00:00Z",
"collectionExplicitness": "notExplicit",
"trackExplicitness": "notExplicit",
"discCount": 1,
"discNumber": 1,
"trackCount": 1,
"trackNumber": 1,
"trackTimeMillis": 196722,
"country": "GBR",
"currency": "GBP",
"primaryGenreName": "Karaoke"
}
]
}';
$json_result = json_decode($string, true);
$collectionViewUrl = $json_result['results'][0]['collectionViewUrl'];
echo $collectionViewUrl;