(PHP 5, PHP 7) Remove a multi handle from a set of cURL handles

(PHP 5 >= 5.1.3, PHP 7) Set multiple options for a cURL transfer

(PHP 5 >= 5.5.0, PHP 7) Create a CURLFile object

(PHP 5, PHP 7) Add a normal cURL handle to a cURL multi handle

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Get information regarding a specific transfer

(PHP 5 >= 5.5.0, PHP 7) Return string describing the given error code