Remove array from JSON decode

Question

Here's the function I'm using to grab and process a JSON input:

<?php
$json = "http://pastebin.com/raw.php?i=ihAapq30";
$cache_lastfm = 'BLAHBLAHDIR/'.sha1($json).'.json';

if(file_exists($cache_lastfm) && filemtime($cache_lastfm) > time() - 1000){
    // if a cache file newer than 1000 seconds exists, use it
    $data = json_decode(file_get_contents($cache_lastfm), true);
} else {
    $data = json_decode(file_get_contents($json), true);
    file_put_contents($cache_lastfm,json_encode($data));
}

$data = $data['recenttracks'];
foreach ($data['track'] as $track) {
    $artist = $track['artist']['#text'];
    $title = $track['name'];
    $url = $track['url'];
echo '<li><a href="', $url, '" title="', $title, '">', $artist, ' - ', $title, '</li></a>'; }
?>

It works perfectly.. my question is, how can I remove only the "entry" that has the:

        "@attr":{
           "nowplaying":"true"
        }

... "attribute"? Check the pastebin page to understand what I mean :)

Why not use the plain old unset($data['recenttracks']['@attr']);, before entering the loop? — mpratt
– mpratt, Commented May 30, 2013 at 22:45
I added it just before foreach and after $data = $data['recenttracks']; but the result is the same (entry with "nowplaying" is still present).. — MultiformeIngegno
– MultiformeIngegno, Commented May 30, 2013 at 22:53

Dave Chen · Accepted Answer · 2013-05-31 01:32:26Z

2

Please try this:

<?php
    $data = $data['recenttracks'];

    $tracks=$data['track'];

    foreach ($tracks as $index=>$track) {
        if (isset($track['@attr'])) {
            unset($tracks[$index]);
        }
    }

    foreach ($tracks as $track) {
        $artist = $track['artist']['#text'];
        $title  = $track['name'];
        $url    = $track['url'];
        echo '<li><a href="', $url, '" title="', $title, '">', $artist, ' - ', $title, '</li></a>';
    }
?>

edited May 31, 2013 at 1:32

answered May 30, 2013 at 22:17

Dave Chen

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6 Comments

MultiformeIngegno Over a year ago

Thanks for the reply! I need to remove the entry only if it has "nowplaying" attribute (which is "under" @attr). How can I modify your reply with this specification? :)

Dave Chen Over a year ago

Check the update, The code works fine on my part, I just changed the formatting for testing.

MultiformeIngegno Over a year ago

Oh, it's my fault.. I explained myself badly. I need the whole.. array-song (in this case) to be removed, if nowplaying is present (artist, album name, song, etc).

Dave Chen Over a year ago

Check the update, the code now removes the entire song if nowplaying is found. I'm guessing that there's only one nowplaying, and if I can guess again, it's the first element every time. If that's the case, just shift the array back once. (Which is the second solution)

MultiformeIngegno Over a year ago

This is my code updated, but I'm still getting the "nowplaying" object..: ffio.it/json.txt For the questions: IF nowplaying is present, it's always as first element (but it's not always present).

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