RSS to HTML parser troubles.

I have a script that create static pages from RSS content. RSS titles that contain characters such as !@$#%^&*()_+{}|,./ ' cause url problems when the state pages are created. I've tried using the preg_replace function, but I cannot get it right. Could somebody please tell me how to fix this. I have posted the script below.

Thanks

<?php 
function unichar($string) { 
               $two= strtolower(str_replace(' ', '', $string)); 
               $res = count(count_chars($two, 1)); 
               return $res; 
               } 





//include ("config.ini.php"); 
function rss2html($url,$m=0,$w=0,$target="_blank",$cssprefix="rsslib",$items,$sourceid,$sectionid,$sections, $status) { 
global $channel; 
//$items; 

global $sitetitle,$version,$powered,$sitedomain, $folder,$rsspath,$datefolder,$fileextention; 

getrss($url,$items); 


if($m==0){ 
$m=count($items); 
} 
      for($i=0;$i<$m;$i++) { 
       
      //--------mysql add-on  ----------------// 
                     $sqlCheck="SELECT link FROM `content` where link = '".$items[$i][1]."' OR Title = '".addslashes($items[$i][0])."'"; 
                     $checkdup=mysql_query($sqlCheck); 
                     $num_rows = mysql_num_rows($checkdup); 
                      
                               
                      if(unichar($items[$i][0])>2){ 
                      
                               if($num_rows > 0){ 
                               
                              } 
                                                       
                           else{ 
                           $titles = str_replace('"','',$items[$i][0]); 
                           $titles = str_replace("'","",$titles); 
                           $titles = preg_replace("/[^a-z0-9\- _\"'\.]/i", "", $titles); 

                           //$titles = str_replace("#","No.",$titles); 
                              $insert = mysql_query ("INSERT INTO `content` ( `ID` , `Title` , `description` , `source` ,`link` , `publish`, `SectionId`, `SourceID`, `timestamp` ) VALUES (NULL, '$titles', '".addslashes($items[$i][2])."', '".addslashes($sections)."', '".addslashes($items[$i][1])."', '$status', '$sectionid','$sourceid','".time()."')"); 
                              } 
                        if($insert = true){ 
                           $inserted .= "Inserted ".$items[$i][0]."...<br>"; 
                        } 
                        else{ 
                           DIE('Error: '.mysql_error()); 
                        } 
                     } 
                  //--------mysql add-on  ----------------// 
      } 
} //end function rss2html 

// *********************************** 

// *********************************** 
function getrss($url,&$items) { 
global $channel; 
global $use_cache,$cache_folder,$cache_valid; 

if($use_cache) { 
   $cache_filename=$cache_folder."/".md5($url).".rss"; 
   if(file_exists($cache_filename)) { 
      $t=filemtime($cache_filename); 
      $cache_create=((!$t)||($t<strtotime("now")-60*$cache_valid)); } 
   else 
      $cache_create=true; 
    
   if($cache_create) { 
      //cache not valid - create it again 
      $simple = file($url); 
      $f=fopen($cache_filename,"w"); 
      for($i=0;$i<count($simple);$i++) 
         fwrite($f,$simple[$i]); 
      fclose($f); 
      $simple=implode('',$simple); 
      } 
   else 
      $simple = implode('',file($cache_filename)); 
} 
else 
   $simple = implode('',file($url)); 

$p = xml_parser_create(); 
xml_parse_into_struct($p,$simple,$vals,$index); 
xml_parser_free($p); 
$type=0; 
$tmp[]=array("","",""); 
$id=0; 
for($i=0;$i<count($vals);$i++) { 

   if(($vals[$i]['tag']=="CHANNEL")&&($vals[$i]['type']=="open")) $id=$vals[$i]['level']+1; 
   if(($type==0)&&($id==$vals[$i]['level'])) 
      switch($vals[$i]['tag']) { 
      case "TITLE": $channel[0]=$vals[$i]['value']; break; 
      case "LINK": $channel[1]=$vals[$i]['value']; break; 
      case "DESCRIPTION": $channel[2]=$vals[$i]['value']; break; 
      case "COPYRIGHT": 
      case "DC:RIGHTS": $channel[3]=$vals[$i]['value']; break; 
      case "MANAGINGEDITOR": 
      case "DC:PUBLISHER": $channel[4]=$vals[$i]['value']; break; 
      case "PUBDATE": 
      case "DC:DATE": $channel[5]=$vals[$i]['value']; break; 
      } 

   else switch($vals[$i]['tag']) { 
      case "TITLE": $tmp[0]=$vals[$i]['value']; break; 
      case "LINK": $tmp[1]=$vals[$i]['value']; break; 
      case "DESCRIPTION": $tmp[2]=$vals[$i]['value']; break; 
      } 

   if($vals[$i]['tag']=="ITEM") { 
      if(($vals[$i]['type']=="open")&&($type==0)) $type=1; 
      if($vals[$i]['type']=="close") { 
         $items[]=$tmp; 
         $tmp[0]=""; 
         $tmp[1]=""; 
         $tmp[2]=""; 
      } 
   } 

} 

//print_r($channel); 
//print_r($items); 
} // end function getrss 
?>

PHP:

 

I assume _ are ok in filenames? If not change the first line.

	$val = str_replace(' ', '_', $val); //replace spaces with _
	$val = str_replace('[', '', $val); //remove [
	$val = str_replace(']', '', $val); //remove ]
	
	$val = preg_replace('_[!@$#%^&*()+{}:;\\><~`?|,./\'"]_', '', $val);

Code (markup):

-the mole