Use register_shutdown_function to log fatal errors, this requires PHP 5.2:

register_shutdown_function( "fatal_handler" );

function fatal_handler() {
    $errfile = "unknown file";
    $errstr  = "shutdown";
    $errno   = E_CORE_ERROR;
    $errline = 0;

    $error = error_get_last();

    if($error !== NULL) {
        $errno   = $error["type"];
        $errfile = $error["file"];
        $errline = $error["line"];
        $errstr  = $error["message"];

        error_mail(format_error( $errno, $errstr, $errfile, $errline));
    }
}

You must define the error_mail and format_error functions. For example:

function format_error( $errno, $errstr, $errfile, $errline ) {
    $trace = print_r( debug_backtrace( false ), true );

    $content = "
    
表>";
return $content;
}


Use Swift Mailer to write the error_mail function. 
See also: 

$php_errormsg
Predefined constants

        

Item
Description

        

            

                
Error
                
$errstr
            
            

Error number
                
$errno
            
            

document
$Error file
            
            

OK
$Error line
            
            

track
                
$trace