Count and register ocurrences

[Rita_Ruah]

Hello, I have a programming doubt... I think this can apply to every language, imagine this scenario where I have this xml:

 

<MediaFiles>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

</MediaFiles>

 

How can I count the number of occurences of <MediaFile> so I can make a group of every mediafile and do a Random to select one of them?

 

Pseudo-code of what I want:

 

foreach(<mediafile> of <mediafiles>)

array[] = mediafile VIDEO;

Edited August 13, 2013 by Rita_Ruah

[AbraCadaver]

simplexml or DOM.  How about real code with specific questions.

[Barand]

perhaps

$str = "<MediaFiles>
<MediaFile>
   <![CDATA[VIDEO1]]>
</MediaFile>
<MediaFile>
   <![CDATA[VIDEO2]]>
</MediaFile>
<MediaFile>
   <![CDATA[VIDEO3]]>
</MediaFile>
<MediaFile>
   <![CDATA[VIDEO4]]>
</MediaFile>
<MediaFile>
   <![CDATA[VIDEO5]]>
</MediaFile>
</MediaFiles>";

$xml = simplexml_load_string($str);
foreach ($xml->MediaFile as $video) {
    $mf[] = trim((string)$video);
}
echo $mf[array_rand($mf)];

[Rita_Ruah]

simplexml or DOM.  How about real code with specific questions.

 

It's real code... instead of VIDEO there are urls... 

 

@Barand

 

Thanks! =)

And in Javascript, how would I do this? 

[Rita_Ruah]

I have this string in Javascript:

 

<MediaFiles>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

<MediaFile>

   <![CDATA[VIDEO]]>

</MediaFile>

</MediaFiles>

 

How can I loop through MediaFile in javascript? 
It's not a xml, it's a string!

 

Thanks!

[Barand]

If you want a JS solution don't post in PHP forum. Moving to JS forum.

[Irate]

JavaScript has its own specification for XML, fittingly called E4X (EMCAScript for XML) which provides everything you need.

 

Check it on Google or on the ECMAScript specification, you'll find loads of helpful tools.

Otherwise, standard DOM methods should work...

Like, document.getElementsByTagName("MediaFiles"), do a for loop and then get the MediaFile tags.

 

Simple enough, though relying solely on JS for your script to work is risky if you can do it with PHP.