PHP script to parse xml-based playlist

[rsxdev]

I need PHP script that will parse XML-based (.xspf format) live stream playlist stored on web server, retrieve track data and print it on my web page. Print inside div as scrolling text (one line). The track data on page need be refreshed synchronously to show current track info.

 

XSPF playlist example:

<?xml version="1.0" encoding="UTF-8"?>
<playlist xmlns="http://xspf.org/ns/0/" version="1">
  <title/>
  <creator/>
  <trackList>
    <track>
      <location>http://geodesid5.streams.audioveduct.com:80/di_ambient7</location>
      <title>Bruno Sanfilippo - Piano Textures 2 II</title>
      <annotation>Stream Title: Ambient - DIGITALLY IMPORTED - a blend of ambient, downtempo, and chillout

Content Type:audio/mpeg
Current Listeners: 0
Peak Listeners: 0
Stream Genre: Electronic Ambient Downtempo</annotation>
      <info>http://www.di.fm</info>
    </track>
  </trackList>
</playlist>

 

I need get data from fields 'title' and 'annotation' (only text between Stream Title and Content Type). Also, after these two, I want scroll small custom text, when required. I searched some close example, but didn't find yet.

Will be DOMDocument method suitable for this task? Can someone show me the right method to do this?

 

 

 

[xyph]

I'd suggest SimpleXML

 

<?php

$xmldata = '<?xml version="1.0" encoding="UTF-8"?>
<playlist xmlns="http://xspf.org/ns/0/" version="1">
  <title/>
  <creator/>
  <trackList>
    <track>
      <location>http://geodesid5.streams.audioveduct.com:80/di_ambient7</location>
      <title>Bruno Sanfilippo - Piano Textures 2 II</title>
      <annotation>Stream Title: Ambient - DIGITALLY IMPORTED - a blend of ambient, downtempo, and chillout

Content Type:audio/mpeg
Current Listeners: 0
Peak Listeners: 0
Stream Genre: Electronic Ambient Downtempo</annotation>
      <info>http://www.di.fm</info>
    </track>
  </trackList>
</playlist>';

$xml = new SimpleXMLElement($xmldata);

foreach( $xml->trackList->track as $track ) {
echo $track->title .' - '. $track->annotation .'<br>';
}

?>

[rsxdev]

well, but I need process URL, not code. So I need get xml document into SimpleXML:

 

<?php

$playlistUrl = 'http://path/to/playlist.xspf';
$xmldata = file_get_contents($playlistUrl);

$xml = new SimpleXMLElement($xmldata);

foreach( $xml->trackList->track as $track ) {
echo $track->title .' - '. $track->annotation .'<br>';
}

?>

 

I need not all data from 'annotation' field, but only part I specified. How to filter it out correctly? Also how to implement custom text and scrolling function?

[xyph]

http://www.php.net/manual/en/function.simplexml-load-file.php

 

I need not all data from 'annotation' field, but only part I specified. How to filter it out correctly? Also how to implement custom text and scrolling function?

 

explode by newline, grab first and third result

[rsxdev]

XMLReader class seems will be better for this task.

[rsxdev]

need be endforeach added to the end?

 

 

<?php

$playlistUrl = 'http://path/to/playlist.xspf';
$xmldata = file_get_contents($playlistUrl);

$xml = new SimpleXMLElement($xmldata);

foreach( $xml->trackList->track as $track ) {
echo $track->title .' - '. $track->annotation .'<br>';

endforeach;
?>

[xyph]

The syntax is available directly in the manual.

http://php.net/manual/en/control-structures.foreach.php

The alternate syntax is mentioned in the User Comments

 

More can be read about it here

http://php.net/manual/en/control-structures.alternative-syntax.php

 

At the moment, you're mixing standard and alternate, which doesn't work.

[rsxdev]

explode by newline, grab first and third result

 

can you show an explode example? The Example1 from http://php.net/explode is too generic. For simplicity, I want grab this part "Stream Genre: Electronic Ambient Downtempo"

[xyph]

<?php

$string = 'This is some text
on multiple lines
oh how could I split this data
into several parts';

# Each OS likes to use it's own linebreaks
# UNIX uses \n
# Mac uses \r (not sure about OSX, as it's unix-based)
# Windows uses \r\n
# You can use the constant, PHP_EOL, but it's not guarenteed. I usually code
# in Windows, but my text-editor uses \n only for linebreaks
# To get them all into the same format, I use the following snippet.

$string = str_replace(array("\r\n","\r"),"\n",$string);
# This snippet first replaces any instance of \r\n to \n, then looks for any
# rogue \r's to convert to \n

$array = explode("\n", $string);

print_r($array);

?>

 

Output

 

Array
(
    [0] => This is some text
    [1] => on multiple lines
    [2] => oh how could I split this data
    [3] => into several parts
)

[rsxdev]

will it count as '\n' new line every tab between words inside <annotation> </annotation> tags?'

[xyph]

What? "\t" is for tabs. And you MUST double quote "\n" to convert it to a linebreak. '\n' is the literal string.

[rsxdev]

oh yes "\n" character as a newline delimiter.

 

For simplicity, I want grab full first line after <annotation> tag (before Content Type:).

not sure will this be right:

 

$metadata->trackList->annotation as $annotation

$parts = explode("\n", $metadata);

echo $parts[0];

 

I need echo it after track title, in one line.

 

 

[xyph]

Try it out It looks like it would work.