[PHP] Is a file included?

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Originally Posted by AngraMainyu

In PHP, associative arrays are implemented as hash tables. Any operation that does not involve iteration is O(1).

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I know. I was saying that include_once is likely implemented as a hash table, whereas the proposals here involve looping through loaded files to check. O(1) vs O(n).

Quote:

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Originally Posted by jMerliN

I know. I was saying that include_once is likely implemented as a hash table,

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I wasn't disagreeing, only confirming.

Quote:

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Originally Posted by jMerliN

whereas the proposals here involve looping through loaded files to check. O(1) vs O(n).

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I should also mention that if the OP checks every include against the list of successfully loaded includes, they're looking at O(n^2) performance, not to mention the performance cost of doing so recursively. O(n) isn't the least of the OP's worries.

core coders :D

Such a simple snippet, cheers Jonty!