Robert Lerner

Category: PHP

  • Using AI to Secure Legacy Software

    Using AI to Secure Legacy Software

    In 2006, I made the decision to stop writing software for Windows (as much as I did at the time), and move to building web applications. The idea was that, unlike desktop applications where I don’t see my users and can’t do updates easily, in a web app I can. I spoke with my brother,…

  • Little Man Computer – Execution

    Little Man Computer – Execution

    So far, we’ve learned about the Little Man Computer architecture and how to write a simple program and assemble it into machine code. You likely already know how the code is executed due to the high quality comments I’ve included in that blog. Regardless, I built a simulator and spent quite a bit of time…

  • Little Man Computer — Assembly Code

    Little Man Computer — Assembly Code

    Cover photo isn’t related, but it’s almost as interesting as my post. Machine Code vs. Assembly Code You’ll often hear these two terms used interchangeably, but they are not the same. People will often state that machine code is the actual “0’s” and “1’s” a machine executes, and that’s pretty close to being correct. People…

  • Little Man Computer – Architecture

    Little Man Computer – Architecture

    Around a year ago, I built and threw a Little Man Computer (“LMC”) simulator, assembler, and a really crappy disassembler and put them up on GitHub. There’s another version in C++ up there as well, but it isn’t as fully built out or stable. “Computer Science” in my high school days consisted of keyboarding and…

  • Function: Identify Image

    This is from a very old post of mine, posted for archival purposes. Ever decide you had to hide an image file and you decide to change the extension to something like “.exe”, or perhaps, you used something like Signal messenger and downloaded an image but it didn’t have a valid extension? Back in 2013,…

  • fopen() for Databases?

    fopen() for Databases?

    This is a VERY old post of mine from 2009 that I’m sharing for sport. This entry assumes that you have some prior knowledge of databases, PHP, or other programming languages. However, for those that don’t, I’ll try to sum it up in a way for visitors to understand. The statement “fopen”, or as PHP…