Returns information about the last transfer, opt may be one of the following:
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"CURLINFO_EFFECTIVE_URL" - Last effective URL
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"CURLINFO_HTTP_CODE" - Last received HTTP code
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"CURLINFO_FILETIME" - Remote time of the retrieved document, if -1 is returned the time of the document is unknown
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"CURLINFO_TOTAL_TIME" - Total transaction time in seconds for last transfer
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"CURLINFO_NAMELOOKUP_TIME" - Time in seconds until name resolving was complete
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"CURLINFO_CONNECT_TIME" - Time in seconds it took to establish the connection
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"CURLINFO_PRETRANSFER_TIME" - Time in seconds from start until just before file transfer begins
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"CURLINFO_STARTTRANSFER_TIME" - Time in seconds until the first byte is about to be transfered
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"CURLINFO_REDIRECT_TIME" - Time in seconds of all redirection steps before final transaction was started
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"CURLINFO_SIZE_UPLOAD" - Total number of bytes uploaded
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"CURLINFO_SIZE_DOWNLOAD" - Total number of bytes downloaded
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"CURLINFO_SPEED_DOWNLOAD" - Average download speed
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"CURLINFO_SPEED_UPLOAD" - Average upload speed
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"CURLINFO_HEADER_SIZE" - Total size of all headers received
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"CURLINFO_REQUEST_SIZE" - Total size of issued requests, currently only for HTTP requests
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"CURLINFO_SSL_VERIFYRESULT" - Result of SSL certification verification requested by setting CURLOPT_SSL_VERIFYPEER
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"CURLINFO_CONTENT_LENGTH_DOWNLOAD" - content-length of download, read from Content-Length: field
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"CURLINFO_CONTENT_LENGTH_UPLOAD" - Specified size of upload
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"CURLINFO_CONTENT_TYPE" - Content-type of downloaded object, NULL indicates server did not send valid Content-Type: header
If called without the optional parameter opt an assoctive array is returned with the following array elements which correspond to opt options:
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"url"
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"content_type"
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"http_encode"
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"header_size"
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"request_size"
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"filetime"
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"ssl_verify_result"
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"redirect_count"
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"total_time"
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"namelookup_time"
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"connect_time"
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"pretransfer_time"
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"size_upload"
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"size_download"
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"speed_download"
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"speed_upload"
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"download_content_length"
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"upload_content_length"
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"starttransfer_time"
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"redirect_time"