Send an Error Message by E-Mail

Code:
<?php
//error handler function
function customError($errno, $errstr)
  {
  echo "<b>Error:</b> [$errno] $errstr<br />";
  echo "Webmaster has been notified";
  error_log("Error: [$errno] $errstr",1,
  "[email protected]","From: [email protected]");
  }

//set error handler
set_error_handler("customError",E_USER_WARNING);

//trigger error
$test=2;
if ($test>1)
  {
  trigger_error("Value must be 1 or below",E_USER_WARNING);
  }
?>
Out put: Error: [512] Value must be 1 or below
Webmaster has been notified