Deprecated: Function ereg_replace() is deprecated

Hallo ik vroeg mij af of jullie mij mischien kunnen helpen, ik krijg de foutmelding Deprecated: Function ereg_replace() is deprecated on line 34 and 35

dit is het script en zouden jullie mij misschien kunnen laten zien wat en hoe ik het precies moet veranderen:

<?php
session_start();
if($_SESSION['name']) {
include "../config.php";

function parseubb($message){
$message = str_replace ("[br]","\n",$message);
$message = str_replace ("\n","<br>",$message);
$message = str_replace ("","<b>Code:</b><br><table bgcolor=\"#000000\" cellspacing=\"1\" width=\"90%\"><tr><td><table cellpadding=2 cellspacing=\"0\" bgcolor=\"#FFFFFF\" width=\"100%\"><tr><td><font face=Courier size=\"1\" color=\"#000000\">", $message);
$message = str_replace ("", "</font></td></tr></table></td></tr></table>", $message);
$message = preg_replace("/\[b\](.*?)\[\/b\]/si", "<b>\\1</b>",$message);
$message = preg_replace("/\[i\](.*?)\[\/i\]/si", "<i>\\1</i>",$message);
$message = preg_replace("/\[u\](.*?)\[\/u\]/si", "<u>\\1</u>",$message);
$message = preg_replace("/\[s\](.*?)\[\/s\]/si", "<s>\\1</s>",$message);
$message = preg_replace("/\[move\](.*?)\[\/move\]/si", "<div align=\"center\"><marquee width=\"90%\">\\1</marquee></div>",$message);
$message = preg_replace ("#\[color=(\#[0-9A-F]{6}|[a-z\-]+)\](.*?)\[/color\]#si", "<font color=\"\\1\">\\2</font>", $message);
$message = preg_replace ("/\[font=(.*)\](.*)\[\/font\]/", "<font face=\"$1\">$2</font>", $message);
$message = preg_replace ("/\[size=(.*)\](.*)\[\/size\]/", "<font size=\"$1\">$2</font>", $message);
$message = preg_replace("/\[img\](.*?)\[\/img\]/si", "<a href=\"\\1\" target=\"_blank\"><img src=\"\\1\" border=\"0\" width=\"20\"></a>",$message);
$message = preg_replace("/\[tt\](.*?)\[\/tt\]/si", "<tt>\\1</tt>",$message);
$message = preg_replace("/\[left\](.*?)\[\/left\]/si", "<div align=\"left\">\\1</div>",$message);
$message = preg_replace("/\[center\](.*?)\[\/center\]/si", "<div align=\"center\">\\1</div>",$message);
$message = preg_replace("/\[right\](.*?)\[\/right\]/si", "<div align=\"right\">\\1</div>",$message);
$message = preg_replace("/\[sub\](.*?)\[\/sub\]/si", "_\\1",$message);
$message = preg_replace("/\[sup\](.*?)\[\/sup\]/si", "^\\1",$message);
$message = preg_replace("/\[fixed\](.*?)\[\/fixed\]/si", "<font face=\"Courier New\">\\1</font>",$message);
$message = str_replace ("[[","{{",$message);
$message = str_replace ("]]","}}",$message);
$message = str_replace ("|","|",$message);
$message = preg_replace("/\[pre\](.*?)\[\/pre\]/si", "<pre>\\1</pre>",$message);
$message = str_replace ("{{","[",$message);
$message = str_replace ("}}","]",$message);
$message = str_replace ("[hr]","<hr color=\"#FFFFFF\" noshade />",$message);
$message = eregi_replace("\\[email=([^\\[]*)\\]([^\\[]*)\\[/email\\]", "<a href=\"mailto:\\1\">\\2</a>",$message);
$message = eregi_replace("\\[url=([^\\[]*)\\]([^\\[]*)\\[/url\\]","<a href=\"\\1\" target=_blank>\\2</a>",$message);
$message = preg_replace("/\[url\](.*?)\[\/url\]/si", "<a href=\"\\1\" target=_blank>\\1</a>",$message);
$message = preg_replace("/\[email\](.*?)\[\/email\]/si", "<a href=\"mailto:\\1\">\\1</a>",$message);
$message = preg_replace ("#\[ftp\]([a-z]+?://){1}([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+\(\)]+)\[/ftp\]#", "<a href=\"ftp://\\1\\2\" target=\"_blank\">\\2</a>", $message);
$message = preg_replace ("#\[ftp\]([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+\(\)]+)\[/ftp\]#", "<a href=\"ftp://\\1\" target=\"_blank\">\\1</a>", $message);
$message = preg_replace ("#\[ftp=([a-z]+?://){1}([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+\(\)]+)\](.*?)\[/ftp\]#", "<a href=\"ftp://\\1\\2\" target=\"_blank\">\\2</a>", $message);
$message = preg_replace ("#\[ftp=([a-z0-9\-\.,\?!%\*_\#:;~\\&$@\/=\+\(\)]+)\](.*?)\[/ftp\]#", "<a href=\"ftp://\\1\" target=\"_blank\">\\2</a>", $message);
$message = str_replace(":)"," <img src=\"images/smilies/smile.gif\" alt=\"Smilie\" />",$message);
$message = str_replace("8["," <img src=\"images/smilies/huh.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":o"," <img src=\"images/smilies/ohmy.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(";)"," <img src=\"images/smilies/wink.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":P"," <img src=\"images/smilies/tongue.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":p"," <img src=\"images/smilies/tongue.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":D"," <img src=\"images/smilies/biggrin.gif\" alt=\"Smilie\" />",$message);
$message = str_replace("8)"," <img src=\"images/smilies/cool.gif\" alt=\"Smilie\" />",$message);
$message = str_replace("*-)"," <img src=\"images/smilies/rolleyes.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":?"," <img src=\"images/smilies/dry.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":@"," <img src=\"images/smilies/mad.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":("," <img src=\"images/smilies/sad.gif\" alt=\"Smilie\" />",$message);
$message = str_replace("8-)"," <img src=\"images/smilies/unsure.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":["," <img src=\"images/smilies/blink.gif\" alt=\"Smilie\" />",$message);
$message = str_replace("[:-]"," <img src=\"images/smilies/ph34r.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(";/"," <img src=\"images/smilies/happy.gif\" alt=\"Smilie\" />",$message);
$message = str_replace("[-)"," <img src=\"images/smilies/sleep.gif\" alt=\"Smilie\" />",$message);
$message = str_replace("(l)"," <img src=\"images/smilies/wub.gif\" alt=\"Smilie\" />",$message);
$message = str_replace("(L)"," <img src=\"images/smilies/wub.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":s"," <img src=\"images/smilies/wacko.gif\" alt=\"Smilie\" />",$message);
$message = str_replace(":S"," <img src=\"images/smilies/wacko.gif\" alt=\"Smilie\" />",$message);
return $message;
}

$query1 = mysql_query("SELECT * FROM ichatgesprek WHERE code = '".$_GET['code']."' AND id1 = '".$_SESSION['userid']."'") or die (mysql_error());
while ($obj1 = mysql_fetch_assoc($query1)) {
$stat = $obj1['status'];

if($stat == 'close') {
echo '<b>Your contact has closed the conversation. He/she doesnt receive anything from you anymore.</b>';
}
}
$query = mysql_query("SELECT * FROM ichatchat WHERE code = '".$_GET['code']."' ORDER BY id ASC") or die (mysql_error());
while ($obj = mysql_fetch_assoc($query)) {
$nick = $obj['nick'];
$message = htmlspecialchars($obj['message']);
$time1 = $obj['time'];
if($time1 > $_SESSION['time']) {
echo '<b>'.$nick.':</b> '.parseubb($message).'<br />';
}
}
}
?>