what is my mistake in this class ?

[cyber_alchemist]

I was trying to write a class which would generate a sitemap for every post which is made or edited, but i don't seem to understand what is my mistake here.

class sitemap {
var $file_net;
var $url_net;
var $extention_net;
var $freq_net;
var $priority_net;

function set() {
  $file = $this->file_net;
  $url = $this->url_net;
  $extention = $this->extention_net;
  $freq = $this->freq_net;
  $priority = $this->priority_net;
}

function Path ($p)
{
    $a = explode ("/", $p);
    $len = strlen ($a[count ($a) - 1]);
    return (substr ($p, 0, strlen ($p) - $len));
}

function GetUrl($url)
{
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $data = curl_exec($ch);
    curl_close($ch);
    return $data;
}

function Scan($url)
{
    global $scanned, $pf, $extension, $skip, $freq, $priority;
    
    echo "scan url $url\n";

    array_push ($scanned, $url);
    $html = GetUrl ($url);
    $a1 = explode ("<a", $html);

    foreach ($a1 as $key => $val)
    {
  $parts = explode (">", $val);
  $a = $parts[0];
  
  $aparts = explode ("href=", $a);

  $hrefparts = explode (" ", $aparts[1]);
  $hrefparts2 = explode ("#", $hrefparts[0]);

  $href = str_replace ("\"", "", $hrefparts2[0]);
  
  if ((substr ($href, 0, 7) != "http://") && 
     (substr ($href, 0,  != "https://") &&
     (substr ($href, 0, 6) != "ftp://"))
  {
      if ($href[0] == '/')
    $href = "$scanned[0]$href";
      else
    $href = Path ($url) . $href;
  }
  
  if (substr ($href, 0, strlen ($scanned[0])) == $scanned[0])
  {
      $ignore = false;
      if (isset ($skip))
    foreach ($skip as $k => $v)
        if (substr ($href, 0, strlen ($v)) == $v)
      $ignore = true;
      
      if ((!$ignore) &&
    (!in_array ($href, $scanned)) && 
    (strpos ($href, $extension) > 0)    
    )
      {
    fwrite ($pf, "<url>\n  <loc>$href</loc>\n" .
           "  <changefreq>$freq</changefreq>\n" .
           "  <priority>$priority</priority>\n</url>\n");
    echo $href. "\n";
    Scan ($href);
      }
  }
    }
}

            


    $pf = fopen ($file, "w");
    if (!$pf)
    {
  echo "cannot create $file\n";
  return;
    }

    fwrite ($pf,"<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<urlset
      xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\"
      xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
      xsi:schemaLocation=\"http://www.sitemaps.org/schemas/sitemap/0.9
            http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd\">
<!-- created with SiteMap Generator -->

<url>
  <loc>$url/</loc>
  <changefreq>daily</changefreq>
</url>
");

    $scanned = array();
    Scan ($url);
    
    fwrite ($pf, "</urlset>\n");
    fclose ($pf);

}

[cyberRobot]

It would be easier to see what was going on if the code was indented properly. It looks like you're missing some closing-curly brackets. I would double check those.

[cyber_alchemist]

nevermind , i overlooked 

$pf = fopen ($file, "w");
    if (!$pf)
    {
  echo "cannot create $file\n";
  return;
    }
 
    fwrite ($pf,"<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<urlset
      xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\"
      xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
      xsi:schemaLocation=\"http://www.sitemaps.org/schemas/sitemap/0.9
            http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd\">
<!-- created with SiteMap Generator -->
 
<url>
  <loc>$url/</loc>
  <changefreq>daily</changefreq>
</url>
");
 
    $scanned = array();
    Scan ($url);
    
    fwrite ($pf, "</urlset>\n");
    fclose ($pf);
 

i was writing this in free style previously