(PHP 5 >= 5.1.0)
An Error Exception.
$message = ""
   [, int $code = 0
   [, int $severity = 1
   [, string $filename = __FILE__
   [, int $lineno = __LINE__
   [, Exception $previous = NULL
  ]]]]]] )The severity of the exception
Example #1 Use set_error_handler() to change error messages into ErrorException.
<?php
function exception_error_handler($severity, $message, $file, $line) {
    if (!(error_reporting() & $severity)) {
        // This error code is not included in error_reporting
        return;
    }
    throw new ErrorException($message, 0, $severity, $file, $line);
}
set_error_handler("exception_error_handler");
/* Trigger exception */
strpos();
?>
The above example will output something similar to:
Fatal error: Uncaught exception 'ErrorException' with message 'strpos() expects at least 2 parameters, 0 given' in /home/bjori/tmp/ex.php:12
Stack trace:
#0 [internal function]: exception_error_handler(2, 'strpos() expect...', '/home/bjori/php...', 12, Array)
#1 /home/bjori/php/cleandocs/test.php(12): strpos()
#2 {main}
  thrown in /home/bjori/tmp/ex.php on line 12