If CURLOPT_RETURNTRANSFER is an option that is set for a specific handle,
then this function will return the content of that cURL handle in the form
of a string.
Parameters
handle
A cURL handle returned by
curl_init.
Return Values
Return the content of a cURL handle if CURLOPT_RETURNTRANSFER is set or null if not set.
Changelog
Version
Description
8.0.0
handle expects a CurlHandle
instance now; previously, a resource was expected.