Tell HN: "Ruby vs. PHP" is not of interest to good hackers.
What to Submit
On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.
Good hackers do not find PHP bashing interesting (or Ruby/MySQL/Java/Python/.NET bashing).
If you do find this sort of thing interesting, please respect the site guidelines and don't submit or upmod it. There are many other places on the web that specialize in this sort of thing.
EDIT: This isn't specifically directed at today's ironic "PHP vs. Ruby" post. That's a relatively mild instance of a more general trend.