A cURL handle returned by curl_init().

This may be one of the following constants:

• CURLINFO_EFFECTIVE_URL - Last effective URL

• CURLINFO_HTTP_CODE - Last received HTTP code

• CURLINFO_FILETIME - Remote time of the retrieved document, if -1 is returned the time of the document is unknown

• CURLINFO_TOTAL_TIME - Total transaction time in seconds for last transfer

• CURLINFO_NAMELOOKUP_TIME - Time in seconds until name resolving was complete

• CURLINFO_CONNECT_TIME - Time in seconds it took to establish the connection

• CURLINFO_PRETRANSFER_TIME - Time in seconds from start until just before file transfer begins

• CURLINFO_STARTTRANSFER_TIME - Time in seconds until the first byte is about to be transferred

• CURLINFO_REDIRECT_TIME - Time in seconds of all redirection steps before final transaction was started

• CURLINFO_SIZE_UPLOAD - Total number of bytes uploaded

• CURLINFO_SIZE_DOWNLOAD - Total number of bytes downloaded

• CURLINFO_SPEED_DOWNLOAD - Average download speed

• CURLINFO_SPEED_UPLOAD - Average upload speed

• CURLINFO_HEADER_SIZE - Total size of all headers received

• CURLINFO_HEADER_OUT - The request string sent. Available since PHP 6.0.0

• CURLINFO_REQUEST_SIZE - Total size of issued requests, currently only for HTTP requests

• CURLINFO_SSL_VERIFYRESULT - Result of SSL certification verification requested by setting CURLOPT_SSL_VERIFYPEER

• CURLINFO_CONTENT_LENGTH_DOWNLOAD - content-length of download, read from Content-Length: field

• CURLINFO_CONTENT_LENGTH_UPLOAD - Specified size of upload

• CURLINFO_CONTENT_TYPE - Content-type of downloaded object, NULL indicates server did not send valid Content-Type: header