php curl 相关知识

 =
curl_setopt(, CURLOPT_URL, 'http://www.baidu.com/', CURLOPT_RETURNTRANSFER, 1->ch, CURLOPT_HEADER, 1
curl_setopt(->ch, CURLOPT_COOKIEJAR,  ->ch, CURLOPT_COOKIEFILE, 
curl_setopt(->ch, CURLOPT_HTTPHEADER, ('User-Agent: Mozilla/5.0'
curl_setopt(, CURLOPT_POST, 1, CURLOPT_POSTFIELDS, 
curl_setopt(->ch, CURLOPT_CONNECTTIMEOUT, 5->ch, CURLOPT_TIMEOUT, 5
curl_setopt(->ch, CURLOPT_FOLLOWLOCATION, 1->ch, CURLOPT_MAXREDIRS, 10
curl_setopt(->ch, CURLOPT_REFERER, 
curl_setopt(->ch, CURLOPT_HTTP_VERSION,->ch, CURLOPT_FORBID_REUSE, 1
curl_setopt(->ch, CURLOPT_SSL_VERIFYPEER, 0->ch, CURLOPT_SSL_VERIFYHOST, 0
curl_setopt(->ch, CURLOPT_NOSIGNAL, 1 = curl_exec((curl_errno();