PHP description of several parameter settings for curl_setopt

Curlopt_header set HTTP header information OUTPUT, 1---output, 0---not output

Curlopt_returntransfer sets whether the information returned by the Curl request is displayed directly or in a string format, 1---A string output, and 0---displayed directly

Curlopt_postfields sets the parameters of the request, if the parameter contains a file name, must be the full path, and should be accompanied by @, generally as an array of output

Curlopt_cookiejar set the file name of the cookie stored after the current request ends

Curlopt_cookiefile set the file name of the cookie information store to use for the current request

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