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Re: Echo URL as hot link
Posted by: Peter Brawley
Date: December 17, 2020 10:57AM

How TheUsual does it ...

/*
 * urlactivate( $txt, &$found, $reg_exUrl ) 
 * surround urls in txt with href or img html code
 */
function urlactivate ( 
    $text, 
    &$found, 
    $reg_exUrl="/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/"
  ) {
  // PREPEND https:// TO BARE www.
  $text = preg_replace( "#(?<!://)www.#", "https://www.";, $text);
  preg_match_all( $reg_exUrl, $text, $matches );
  $usedUrls = array();
  foreach( $matches[0] as $url ) {
    if( !array_key_exists( $url, $usedUrls ) ) {
      $found = TRUE;
      $usedUrls[$url] = true;
      if( isImage($url) ) {
        $text = str_replace( $url, '<img src="'.$url.'">', $text );
      }
      else {
        $offset=0;
        while( ($p=stripos($text,$url,$offset)) !== FALSE ) {
          $s = strtolower( substr($text,$p-9,9) );
          if( $s != "<a href='" && $s != '<a href="' ) {
            $text = substr_replace( $text, 
                                    '<a target=\"_blank\" href="'.$url.'">'.$url.'</a>', 
                                    $p, 
                                    strlen($url) 
                                  );
            $offset += $p + ( 2 * strlen($url) ) + 14;
          }
          else $offset += $p + strlen($url);
          if( $offset >= strlen($txt) ) break;
        }
        $text = str_replace( "<a href=", "<a target='_blank' href=", $text );
      }
    }
  }
  return $text;
}

function isImage( $url ) {
  return stripos( "|.gif|.jpg|.png|.tif|.bmp|.ico|", substr($url,-4) ) 
      || stripos( "|.jpeg|.tiff|", substr($url,-5) );
}

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Subject
Written By
Posted
December 17, 2020 04:44AM
Re: Echo URL as hot link
December 17, 2020 10:57AM
December 18, 2020 05:51AM


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