When searching for a post, it is possible to filter the posts by a string that must be present in a block code, such as with code:"preg_match".  This search option is not documented, though.

Does this mean the option could be removed at any moment, or is it an option that is subject to changes?

  • 3
    Shhhh! It has been a while though, so I'm not sure if it's still "in-testing" or not.
    – Tim Stone
    Commented Sep 12, 2012 at 19:08
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    Should I have titled the question "Shhhh! Why is the 'code:' […]"? ;)
    – avpaderno
    Commented Sep 12, 2012 at 19:11
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    @kiamlaluno That would attract less attention than "Eeeeeek! Why is the 'code:'..." Commented Sep 12, 2012 at 19:16
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    Add Code search syntax to search tips
    – Zelda
    Commented Sep 12, 2012 at 19:50
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    It's not a secret, but it's not polished either...I was interrupted in the middle of implementing it and haven't re-visited it in a while. You're welcome to use it and we won't remove it. That being said, I don't feel it's 1.0 quality at this point, so haven't added it to documentation as I expect there are bugs I'll find with more testing locally. We're doing a lot behind the scenes right now, when that settles down I'll re-visit search (we have lots of ideas/code in the pipe there). Commented Sep 13, 2012 at 0:07

1 Answer 1


This has since made in into the Help Center article on searching:

To search only within code blocks: code:"new" to search code within posts for the word "new".

As far as I can tell, this was added at some point in May 2020, checking through the Web Archive to see when that line first appeared.

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