functions/url_parser.php

   1 <?php
   2    /* URL Passing code to allow links from with in emails */
   3    /* $Id$ */
   4
   5    $url_parser_php = true;
   6
   7    function replaceBlock ($in, $replace, $start, $end) {
   8       $begin = substr($in,0,$start);
   9       $end   = substr($in,$end,strlen($in)-$end);
  10       $ret   = $begin.$replace.$end;
  11       return $ret;
  12    }
  13
  14    function parseEmail (&$body) {
  15       global $color;
  16       $Size = strlen($body);
  17
  18       // Having this defined in just one spot could help when changes need
  19       // to be made to the pattern
  20       // Make sure that the expression is evaluated case insensitively
  21       //
  22       // Here's pretty sophisticated IP matching:
  23       // $IPMatch = '(2[0-5][0-9]|1?[0-9]{1,2})';
  24       // $IPMatch = '\[?' . $IPMatch . '(\.' . $IPMatch . '){3}\]?';
  25       //
  26       // Here's enough:
  27       $IPMatch = '\[?[0-9]{1,3}(\.[0-9]{1,3}){3}\]?';
  28       $Host = '(' . $IPMatch . '|[0-9a-z]([-.]?[0-9a-z])*\.[a-wyz][a-z](g|l|m|pa|t|u|v)?)';
  29       $Expression = '[0-9a-z]([-_.]?[0-9a-z])*(%' . $Host . ')?@' . $Host;
  30
  31       /*
  32         This is here in case we ever decide to use highlighting of searched
  33         text.  this does it for email addresses
  34
  35       if ($what && ($where == "BODY" || $where == "TEXT")) {
  36          eregi ($Expression, $body, $regs);
  37          $oldaddr = $regs[0];
  38          if ($oldaddr) {
  39             $newaddr = eregi_replace ($what, "<b><font color=\"$color[2]\">$what</font></font></b>", $oldaddr);
  40             $body = str_replace ($oldaddr, "<a href=\"../src/compose.php?send_to=$oldaddr\">$newaddr</a>", $body);
  41          }
  42       } else {
  43          $body = eregi_replace ($Expression, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body);
  44       }
  45       */
  46
  47       $body = eregi_replace ($Expression, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body);
  48
  49       // If there are any changes, it'll just get bigger.
  50       if ($Size != strlen($body))
  51           return 1;
  52       return 0;
  53    }
  54
  55
  56    function parseUrl (&$body)
  57    {
  58       $url_tokens = array(
  59          'http://',
  60          'https://',
  61          'ftp://',
  62          'telnet:',  // Special case -- doesn't need the slashes
  63          'gopher://',
  64          'news://');
  65
  66       $poss_ends = array(' ', '\n', '\r', '<', '>', '.\r', '.\n', '.&nbsp;',
  67          '&nbsp;', ')', '(', '&quot;', '&lt;', '&gt;', '.<', ']', '[', '{',
  68          '}', '\240');
  69
  70       $start = 0;
  71       $target_pos = strlen($body);
  72
  73       while ($start != $target_pos)
  74       {
  75         $target_token = '';
  76
  77         // Find the first token to replace
  78         foreach ($url_tokens as $the_token)
  79         {
  80           $pos = strpos(strtolower($body), $the_token, $start);
  81           if (is_int($pos) && $pos < $target_pos)
  82           {
  83             $target_pos = $pos;
  84             $target_token = $the_token;
  85           }
  86         }
  87
  88         // Look for email addresses between $start and $target_pos
  89         $check_str = substr($body, $start, $target_pos);
  90
  91         if (parseEmail($check_str))
  92         {
  93           $body = replaceBlock($body, $check_str, $start, $target_pos);
  94           $target_pos = strlen($check_str) + $start;
  95         }
  96
  97         // If there was a token to replace, replace it
  98         if ($target_token != '')
  99         {
 100           // Find the end of the URL
 101           $end=strlen($body);
 102           foreach ($poss_ends as $key => $val)
 103           {
 104             $enda = strpos($body,$val,$target_pos);
 105             if (is_int($enda) && $enda < $end)
 106               $end = $enda;
 107           }
 108
 109           // Extract URL
 110           $url = substr($body, $target_pos, $end-$target_pos);
 111
 112           // Replace URL with HyperLinked Url, requires 1 char in link
 113           if ($url != '' && $url != $target_token)
 114           {
 115             $url_str = "<a href=\"$url\" target=\"_blank\">$url</a>";
 116             $body = replaceBlock($body,$url_str,$target_pos,$end);
 117             $target_pos += strlen($url_str);
 118           }
 119           else
 120           {
 121              // Not quite a valid link, skip ahead to next chance
 122              $target_pos += strlen($target_token);
 123           }
 124         }
 125
 126         // Move forward
 127         $start = $target_pos;
 128         $target_pos = strlen($body);
 129       }
 130    }
 131
 132 ?>