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phpapc

What's the maximum key length for PHP APC?

You would think this would be super-easy to find, but I can't seem to.

Solution

  • I really don't know PHP, but it looks like values are added using apc_add() or apc_store(), which take keys which are strings. I would infer that the maximum key length is therefore the maximum length of a string in PHP.

    According to PHP: Strings,

    Note: It is no problem for a string to become very large. PHP imposes no boundary on the size of a string; the only limit is the available memory of the computer on which PHP is running.