How to search/filter node content inside of xml file with SimpleXMLElement - php

I need to filter/search all links (png,jpg,mp3) from an XXML file but I got stuck there. I did for example to get all mp3 but I did it knowing that was there, but for example if I put other file where the path is different, then it won't detect it.

    foreach($xml->BODY->GENERAL->SOUNDS->SOUND as $a){
    echo '<a href="'.$a->PATH.'">'.$a->PATH.'</a><br>';
    }

Example XML

Solution

You could get the extension of each file and compare it to an array of "accepted extensions". Then use, continue to skip to write link:

$accepted_exts = ['png','jpg','mp3'];
foreach($xml->BODY->GENERAL->SOUNDS->SOUND as $a) {
    $path = $a->PATH;
    $ext = strtolower(substr($path, strrpos($path, '.') + 1));
    if (!in_array($ext, $accepted_exts)) continue ; // continue to next iteration
    echo '<a href="'.$path.'">'.$path.'</a><br>'; // write the link
}

To get other links:

$accepted_exts = ['png','jpg','mp3'];
$links = [] ;
foreach($xml->HEAD as $items) {
    foreach ($items as $item) {
        $path = (string)$item;
        if (!in_array(get_ext($path), $accepted_exts)) continue ; // continue to next iteration
        $links[] = $path ;
    }
}
foreach($xml->BODY->GENERAL->SOUNDS->SOUND as $a) {
    $path = $a->PATH;
    if (!in_array(get_ext($path), $accepted_exts)) continue ; // continue to next iteration
    $links[] = $path ;
}
foreach ($links as $path) {
    echo '<a href="'.$path.'">'.$path.'</a><br>'; // write the link
}
function get_ext($path) {
    return strtolower(substr($path, strrpos($path, '.') + 1));
}

Will outputs:

<a href="http://player.glifing.com/img/Player/blue.png">http://player.glifing.com/img/Player/blue.png</a><br>
<a href="http://player.glifing.com/img/Player/blue_intro.png">http://player.glifing.com/img/Player/blue_intro.png</a><br>
<a href="http://player.glifing.com/upload/fondoinstrucciones2.jpg">http://player.glifing.com/upload/fondoinstrucciones2.jpg</a><br>
<a href="http://player.glifing.com/upload/stopbet2.png">http://player.glifing.com/upload/stopbet2.png</a><br>
<a href="http://player.glifing.com/upload/goglif2.png">http://player.glifing.com/upload/goglif2.png</a><br>
<a href="http://player.glifing.com/img/Player/Glif 3 OK.png">http://player.glifing.com/img/Player/Glif 3 OK.png</a><br>
<a href="http://player.glifing.com/img/Player/BetPensant.png">http://player.glifing.com/img/Player/BetPensant.png</a><br>
<a href="http://player.glifing.com/audio/Player/si.mp3">http://player.glifing.com/audio/Player/si.mp3</a><br>
<a href="http://player.glifing.com/audio/Player/no.mp3">http://player.glifing.com/audio/Player/no.mp3</a><br>