nicholas@2249: <?php
nicholas@2249: 
nicholas@2249: //http://stackoverflow.com/questions/4444475/transfrom-relative-path-into-absolute-url-using-php
nicholas@2249: function rel2abs($rel, $base)
nicholas@2249: {
nicholas@2249:     /* return if already absolute URL */
nicholas@2249:     if (parse_url($rel, PHP_URL_SCHEME) != '' || substr($rel, 0, 2) == '//') return $rel;
nicholas@2249: 
nicholas@2249:     /* queries and anchors */
nicholas@2249:     if ($rel[0]=='#' || $rel[0]=='?') return $base.$rel;
nicholas@2249: 
nicholas@2249:     /* parse base URL and convert to local variables:
nicholas@2249:      $scheme, $host, $path */
nicholas@2249:     extract(parse_url($base));
nicholas@2249: 
nicholas@2249:     /* remove non-directory element from path */
nicholas@2249:     $path = preg_replace('#/[^/]*$#', '', $path);
nicholas@2249: 
nicholas@2249:     /* destroy path if relative url points to root */
nicholas@2249:     if ($rel[0] == '/') $path = '';
nicholas@2249: 
nicholas@2249:     /* dirty absolute URL */
nicholas@2249:     $abs = "$host$path/$rel";
nicholas@2249: 
nicholas@2249:     /* replace '//' or '/./' or '/foo/../' with '/' */
nicholas@2249:     $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
nicholas@2249:     for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
nicholas@2249: 
nicholas@2249:     /* absolute URL is ready! */
nicholas@2249:     return $scheme.'://'.$abs;
nicholas@2249: }
nicholas@2538: ?>