PHPCMS关键字内链关联链接的解决方案

function keylinks($txt,$replacenum = '')
{
$linkdatas =
cache_read('keylink.php',1);

//暂时屏蔽超链接
$txt
= preg_replace("/(<a(.*))(>)(.*)(<)(/a>)/isU",'1-]-4-[-6',
$txt);

$GLOBALS['replaced'] = array();

if($linkdatas)
{
  $word = $replacement =
array();
  foreach($linkdatas as
$v)
  {
   $word[] =
$v[0];
   $GLOBALS['replaced'][$v[0]] =
0;
   $replacement[] = '<a href="'.$v[1].'" target="_blank"
class="keylink">'.$v[0].'</a>';
  }
}
$txt
= preg_replace("/(^|>)([^<]+)(?=<|$)/sUe","_highlight('2',$word,
$replacement,'1',$replacenum)",$txt);

//恢复超链接 liehuo.net
$txt =
preg_replace("/(<a(.*))-]-(.*)-[-(/a>)/isU",'1>3<<A
href="file://4'">4',$txt);
return $txt;
}

//高亮专用,替换多次是可能不能达到最多次
function _highlight($string,$words,$result,
$pre,$cfg_replace_num)
{
$string = str_replace('"','"',
$string);
if($cfg_replace_num > 0)
{
  foreach
($words as $key =>
$word)
  {
   if($GLOBALS['replaced'][$word] ==
1)
   {
    continue;
   }
   $string
= preg_replace("/".preg_quote($word)."/",$result[$key],$string,
$cfg_replace_num);
   if(strpos($string,$word) !==
false)
   {
    $GLOBALS['replaced'][$word]
=
1;
   }
  }
}
else
{
  $string
= str_replace($words,$string);
}
return
$pre.$string;
}