[lunarmys]

Även om dokumentationen säger annorlunda, så hittar man följande i dokumentationen på php.net:
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About CURLOPT_COOKIEJAR and CURLOPT_COOKIEFILE, and which / how to use.

- CURLOPT_COOKIEJAR is used when cURL is reading cookie data from disk.

- CURLOPT_COOKIEFILE is used when cURL is writing the cookie data to disk.

So you need to specify both (and set the same file location on both) when working with sessions for example.
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