How do you detect an error and THEN do something?

[ShepMode]

I would like to detect an error and redirect the user to error-page.php and some other stuff, but I have no idea which function contains the value of an error.

The structure would be:

if (isset(error())) {
mail someone,
enter the error into the db,
redirect the user to error-page.php
}

I know how to do everything but find out what the error is! Thanks in advance.

[spstieng]

Don't know how to do it, but I think every error has an error code, like 404 (page not found).

If you can identify the error, then you can execute your scripts.

[stolzyboy]

you can use a function, this one is straight from php.net

function myErrorHandler( $errno, $errstr, $errfile, $errline )
{
  $replevel = error_reporting();
  if( ( $errno & $replevel ) != $errno )
  {
    // we shall remain quiet.
    return;
  }
  echo( "error....." );

more info on error_reporting can be found here