PHP description of several parameter settings of curl_setopt

Description of several parameter settings of curl_setopt in PHP: CURLOPT_HEADER specifies whether the http header information is output, 1 --- output, 0 --- no output

CURLOPT_RETURNTRANSFER sets whether the information returned by the curl request is directly displayed or output in string format. 1 --- output in string format, 0 --- directly displayed.

CURLOPT_POSTFIELDS sets the request parameter. if the parameter contains a file name, it must be a complete path with @, which is usually output as an array.

CURLOPT_COOKIEJAR

CURLOPT_COOKIEFILE: specifies the name of the cookie information stored in the current request.