In php3 I was able to call the mysql_error() whenever there was a mysql specific error (IE: If the script was not able to conect to the server it would display info about it), but it seems everytime the mysql_error() function is called under php4b2 it simply returns a NULL string. I've tested it under conditions where the mysql server is down, and the page displays the warning message cgenerated by php3's warning facility, but if I try to echo mysql_error() I retrieve nothing back. Could anyone tell me why this is, and if it's a big could you please notify me so I can be sure it's not just some stupid mistake on my part :)

************* MODULES COMPILED IN ************
mysql
gd1.3
zlib
ttf

************ SHORT SCRIPT *****************
$conn = mysql_connect("localhost","user","pass); // Server that is currently down.
if(!$conn) {
    echo mysql_error();
    exit;
}