(PHP 5 >= 5.1.0, PHP 7)
Examples:
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
ErrorException::getSeverity

(PHP 5 >= 5.1.0, PHP 7) Gets the exception severity

2016-02-24 15:53:29
ErrorException::__construct

(PHP 5 >= 5.1.0, PHP 7) Constructs the exception

2016-02-24 15:53:29