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September 17, 2025

Drill: Guess the Binary Number

I wanted to be able to read binary numbers better, mostly 0-255, because it is sometimes used in networking and because it's interesting to me right now. So, here's a little practice system:...

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September 16, 2025

Drill: Guess the Hex Number

I wanted to be able to read hex numbers better, mostly 0-255, because it is sometimes used in networking and because it's interesting to me right now. So, here's a little practice system: Reveal...

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September 16, 2025

Names in OSI Model

Application Layer: Data Transport Layer: Segment Network Layer: Packet Link/Physical Layer: Frame

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September 13, 2025

Man-in-the-Middle (mitm) Proxy

This thing is fantastic: Man in the Middle Proxy. It focuses a little higher in the network stack than tools like Wireshark and gives you insight about the traffic to and from your computer. It can...

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September 12, 2025

Subnetting

Using that cheatsheet, solve for: Subnetting practice: https://subnetipv4.com/ CIDR Calculator: https://cidr.xyz/ Useful Linux app: (Might need sudo apt update && sudo apt...

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September 11, 2025

MySQL - Check Collation and Charset

How to check collation and charset in mysql. utf8mb4_general_ci "ci" = case-insensitive. "A" = "a". "café" = "cafe" (accent-insensitive). utf8mb4_bin “bin” = binary. "A" ≠ "a"....

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July 11, 2025

How to Make a Typed PHP Array or Collection

So, one thing a lot of people want that PHP doesn't natively support is typed arrays. In other languages you can say "I want an array of integers" or "I want an array of strings" or "I want this to...

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July 11, 2025

Make Copying to the Clipboard From the Terminal in Mac and Linux Smoother

I use both Mac and Linux. I'm used to copying things to my clipboard from a terminal using pbcopy, so this helper makes it easier because I don't have to remember the linux flavor of the command....

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July 11, 2025

Objects That: Have State vs Do Work

I'm self taught at developing. Been at it for a long time, but I've missed some of the pivots the world of developers - PHP specifically - have done, and when classes were introduced back in PHP 4,...

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July 10, 2025

PHP - How to Turn an Array into a PDO-Safe IN Query

In code using legacy PDO-style statements, if you need to do something like an "IN" query using user-supplied data, you're in for danger if you don't parameterize them. PDO can handle the security...

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