Program to customize the 404 error page and send a letter to the administrator

If your user cannot find the page he is looking for, how to give him a friendly reply, and you also know that this error has occurred? Take a look at the following program, which is used to customize the 404 error page and send a notification to the network administrator. nice one. ---teaman translation and finishing
# Set $domain as your domain name (note that there is no www)
$domain = "oso.com.cn";
# Set the URL, note that there is no trailing /
$ docroot = "http://www.oso.com.cn";
# Set the font of the error message
$fontface = "Verdana";
# Set the font size of the 404 page
$fontsize = "2";
# Set The background color of the 404 page, the default is white
$bgcolor = "#ffffff";
# Set the text color, the default is black
$textcolor = "#000000";
# Use the $reportlevel variable to control whether to send the message to Network management
# 0 = No need to send a message at all, hey, how could teaman go wrong?
# 1 = Only send a message when the page contains your DOMAIN NAME
# 2 = Send a message even if the connection to me is disconnected, It may be a friendly site
$reportlevel = 2; //This is the safest option
$emailaddress = "webmaster@oso.com.cn"; //Set the email address to receive error messages
function print_details()
{
# Request access to the global variables we need
global $fontface, $fontsize, $docroot, $REQUEST_URI, $reportlevel;
global $bgcolor, $textcolor;
# Print the 404 error in web format
echo "< head>";
echo "";
echo "404 Sorry, I did not find the page you requested";
echo "

echo "Oso Network Administrator reminds you that the page you requested, $docroot$REQUEST_URI, doesn't exist";
echo " on this server.

";
if ($ ReportLevel! = 0)
{
echo "& lt; p & gt; & lt; font face =" $ fontface "size =" $ fontsize "& gt;"
echo "error message has been sent to the hands of Oso.";
}
return;
}
# EMAIL handler function send_email()
{
# Request access to the global variables we need
global $REQUEST_URI, $HTTP_REFERER, $emailaddress, $REMOTE_ADDR, $docroot;
# Customize the message sent , such as time and place, etc.
$today = getdate();
$month = $today[mon];
$mday = $today[mday];
$year = $today[year];
$hours = $today [hours];
$minutes = $today[minutes];
$errortime = "$month/$mday/$year at $hours:$minutes";
# Create the body of the email message
$message .= " 404 Error ReportnnA 404 error was encountered by $REMOTE_ADDR";
$message .= " on $errortime.nn";
$message .= "The URI which generated the error is: n$docroot$REQUEST_URInn";
$message . = "The referring page was:n$HTTP_REFERERnn";
# Send the mail message. This assumes mail() will work on your system!
mail("$emailaddress", "404 Error Report", $message, "From: $emailaddress"); //Okay, send the letter
return;
}
# The following are based on the setting of the variable $reportlevel to send the letter or not.
print_details();
# See whether or not we should send an email report. If so, do it.
if ($reportlevel != 0)
if ($reportlevel == 1) { ,$HTTP_REFERER))                                             send_email();
The above has introduced the procedure for customizing the 404 error page and sending a letter to the administrator, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.