"Hey man, I found a decent script here - it's not a full-on card checker but it does include some basic Luhn algo checks. I've used it and it's saved me some time in the past. Anybody know of any good PHP libraries for card validation?"
"Dude, I think you're looking for a card validation script. I used this one on my own website and it worked like a charm: https://github.com/zencoder/creditcard. Let me know if you need any further assistance."
"Already saw a similar code floating around, but this PHP source looks cleaner. Has anyone tried integrating this with a blockchain explorer to verify the CC details in real-time?"
"Yo, anyone got a simple PHP source for validating credit card numbers? Saw this lib a while back, might be useful for some of you: https://github.com/iamcaleb/cc-check - not sure if its legit or not tho"
"Yo, I found a simpler way to do this with a library like Laravel. You can use it to generate a card checker and make the code way more readable. Anyone with some PHP experience should be able to pick it up pretty easily."