Erro ao mudar de host

[Johny]

<?php 
//Estatisticas dos browsers
if ((ereg("Nav", $_SERVER["HTTP_USER_AGENT"])) || (ereg("Gold", $_SERVER["HTTP_USER_AGENT"])) || (ereg("X11", $_SERVER["HTTP_USER_AGENT"])) || (ereg("Mozilla", $_SERVER["HTTP_USER_AGENT"])) || (ereg("Netscape", $_SERVER["HTTP_USER_AGENT"])) AND (!ereg("MSIE", $_SERVER["HTTP_USER_AGENT"])) AND (!ereg("Konqueror", $_SERVER["HTTP_USER_AGENT"])) AND (!ereg("Yahoo", $_SERVER["HTTP_USER_AGENT"])) AND (!ereg("Firefox", $_SERVER["HTTP_USER_AGENT"]))) $browser = "Netscape";
elseif(ereg("Firefox", $_SERVER["HTTP_USER_AGENT"])) $browser = "Firefox";
elseif(ereg("MSIE", $_SERVER["HTTP_USER_AGENT"])) $browser = "MSIE";
elseif(ereg("Lynx", $_SERVER["HTTP_USER_AGENT"])) $browser = "Lynx";
elseif(ereg("Opera", $_SERVER["HTTP_USER_AGENT"])) $browser = "Opera";
elseif(ereg("WebTV", $_SERVER["HTTP_USER_AGENT"])) $browser = "WebTV";
elseif(ereg("Konqueror", $_SERVER["HTTP_USER_AGENT"])) $browser = "Konqueror";
elseif((eregi("bot", $_SERVER["HTTP_USER_AGENT"])) || (ereg("Google", $_SERVER["HTTP_USER_AGENT"])) || (ereg("Slurp", $_SERVER["HTTP_USER_AGENT"])) || (ereg("Scooter", $_SERVER["HTTP_USER_AGENT"])) || (eregi("Spider", $_SERVER["HTTP_USER_AGENT"])) || (eregi("Infoseek", $_SERVER["HTTP_USER_AGENT"]))) $browser = "Bot";
else $browser = "Outro";

//Estatisticas dos Sistemas Operativos
if(ereg("Win", $_SERVER["HTTP_USER_AGENT"])) $os = "Windows";
elseif((ereg("Mac", $_SERVER["HTTP_USER_AGENT"])) || (ereg("PPC", $_SERVER["HTTP_USER_AGENT"]))) $os = "Mac";
elseif(ereg("Linux", $_SERVER["HTTP_USER_AGENT"])) $os = "Linux";
elseif(ereg("FreeBSD", $_SERVER["HTTP_USER_AGENT"])) $os = "FreeBSD";
elseif(ereg("SunOS", $_SERVER["HTTP_USER_AGENT"])) $os = "SunOS";
elseif(ereg("IRIX", $_SERVER["HTTP_USER_AGENT"])) $os = "IRIX";
elseif(ereg("BeOS", $_SERVER["HTTP_USER_AGENT"])) $os = "BeOS";
elseif(ereg("OS/2", $_SERVER["HTTP_USER_AGENT"])) $os = "OS/2";
elseif(ereg("AIX", $_SERVER["HTTP_USER_AGENT"])) $os = "AIX";
else $os = "Outro"; 

Boas malta tenho este codigo que estava a funcionar correctamente, mas agora mudei de servidor e está me a dar este erro

Deprecated: Function ereg() is deprecated in estatisticas.php on line 3

Deprecated: Function ereg() is deprecated in estatisticas.php on line 3

Deprecated: Function ereg() is deprecated in estatisticas.php on line 3

Deprecated: Function ereg() is deprecated in estatisticas.php on line 3

Deprecated: Function ereg() is deprecated in estatisticas.php on line 3

Deprecated: Function ereg() is deprecated in estatisticas.php on line 4

Deprecated: Function ereg() is deprecated in estatisticas.php on line 5

Deprecated: Function ereg() is deprecated in estatisticas.php on line 14

como posso corrigir isto?

[yoda]

Usa o preg_match() em vez do ereg()

http://www.php.net/manual/en/function.preg-match.php

[Johny]

Agora aparece-se este erro:

Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in estatisticas.php on line 3

Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in estatisticas.php on line 3

Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in estatisticas.php on line 3

Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in estatisticas.php on line 3

Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in estatisticas.php on line 3

Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash inestatisticas.php on line 14

[yoda]

Tem de ser adaptada a syntax a essa função.