Register_shutdown_function Catch fatal error

Today because of contact with a framework, various try,catch. Throws a fatal error and a syntax error to 500. Try,catch is unable to catch the wrong. And then use the next register_shutdown_function This method, very good
The principle of this method is to call it once before the end of the PHP process. So with Error_get_last(this method, by definition, returns the last error) can be a good catch fatal error

Register_shutdown_function (' shutdown_function ');  
Try
{
    $a = new A ();//This will report fatal error
    Echo 5/0;
}
catch (Exception $e)
{
    echo ' exception capture ';
    Print $e->getmessage ();
}

function shutdown_function ()  
{  
    echo ' catch error ';
    $e = Error_get_last ();    
    Print_r ($e);  

Here I started making a mistake by writing register_shutdown_function to the end. Because the PHP code was executed from beginning to end, the process was interrupted by a fatal error before it was executed to your method, so put him in the beginning