php错误\将错误记录到mysql

在以前的一张票上我 asked about logging PHP errors in MySQL 这给了我:

function myErrorHandler($errno, $errstr, $errfile, $errline)
{
         // mysql connect etc here...
    $sql = "INSERT INTO `error_log` SET
            `number` = ".mysql_real_escape_string($errno).",
            `string` = ".mysql_real_escape_string($errstr).",
            `file` = ".mysql_real_escape_string($errfile).",
            `line` = ".mysql_real_escape_string($errline);
    mysql_query($sql);
    // Don't execute PHP internal error handler
    return true;
}

// set to the user defined error handler 
$new_error_handler = set_error_handler("myErrorHandler");

我可以这样做,但前提是它是这样触发的:

trigger_error("message here");

但是,我还希望对所有错误(如语法错误)调用错误处理程序,如:

echo "foo;

但这些错误只是输出到屏幕上,我做错了什么?