PHP: Turn relative links into absolute ones?

[xtothez]

Hi,

does anyone know of a function to turn relative links in HTML code (<a href="..."></a>, <img src="...">, ...) into absolute links?

Any help is appreciated.

X

[tagammeer]

Try this function:

PHP Code:

function absolute_url($txt, $base_url){
  $needles = array('href="', 'src="', 'background="');
  $new_txt = '';
  if(substr($base_url,-1) != '/') $base_url .= '/';
  $new_base_url = $base_url;
  $base_url_parts = parse_url($base_url);

  foreach($needles as $needle){
    while($pos = strpos($txt, $needle)){
      $pos += strlen($needle);
      if(substr($txt,$pos,7) != 'http://' && substr($txt,$pos,8) != 'https://' && substr($txt,$pos,6) != 'ftp://' && substr($txt,$pos,9) != 'mailto://'){
        if(substr($txt,$pos,1) == '/') $new_base_url = $base_url_parts['scheme'].'://'.$base_url_parts['host'];
        $new_txt .= substr($txt,0,$pos).$new_base_url;
      } else {
        $new_txt .= substr($txt,0,$pos);
      }
      $txt = substr($txt,$pos);
    }
    $txt = $new_txt.$txt;
    $new_txt = '';
  }
  return $txt;
} 


$txt is your HTML code where you want to convert your relative links. Works like a charm for me!

[xtothez]

Hey, that's a nice one. Does exactly what I need.

Thanks, tagammeer (btw, what is "tagammeer"? Is that a name, or does it mean something? Just curious... )

[tagammeer]

btw, what is "tagammeer"? Is that a name, or does it mean something? Just curious...

No, it's not a name, "Tag am Meer" is German for "a day at the beach". I hope it gets warmer soon...

[Leszek]

Like for example PHP-QT.

[mmrs151]

Originally Posted by tagammeer

Try this function:

PHP Code:

function absolute_url($txt, $base_url){
  $needles = array('href="', 'src="', 'background="');
  $new_txt = '';
  if(substr($base_url,-1) != '/') $base_url .= '/';
  $new_base_url = $base_url;
  $base_url_parts = parse_url($base_url);

  foreach($needles as $needle){
    while($pos = strpos($txt, $needle)){
      $pos += strlen($needle);
      if(substr($txt,$pos,7) != 'http://' && substr($txt,$pos,8) != 'https://' && substr($txt,$pos,6) != 'ftp://' && substr($txt,$pos,9) != 'mailto://'){
        if(substr($txt,$pos,1) == '/') $new_base_url = $base_url_parts['scheme'].'://'.$base_url_parts['host'];
        $new_txt .= substr($txt,0,$pos).$new_base_url;
      } else {
        $new_txt .= substr($txt,0,$pos);
      }
      $txt = substr($txt,$pos);
    }
    $txt = $new_txt.$txt;
    $new_txt = '';
  }
  return $txt;
} 


$txt is your HTML code where you want to convert your relative links. Works like a charm for me!

Hi, if you can give me an example how to use this wonderfull piece of code...

[falko]

$new_txt = absolute_url($txt, $base_url);

where $txt holds the text that you want to modify and $base_url is the URL of the site.