PHP cURL初始化和执行方法入门级代码

$ch = curl_init();
# 设定url和把结果返回,是否返回头部
curl_setopt($ch,CURLOPT_URL,'http://www.baidu.com/');
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($this->ch,CURLOPT_HEADER,1);
# cookie文件设定
curl_setopt($this->ch,CURLOPT_COOKIEJAR,$cookie_file);
curl_setopt($this->ch,CURLOPT_COOKIEFILE,$cookie_file);
# 额外头部
curl_setopt($this->ch,CURLOPT_HTTPHEADER,array('User-Agent: Mozilla/5.0'));
# 设定post
curl_setopt($ch,CURLOPT_POST,1);
curl_setopt($ch,CURLOPT_POSTFIELDS,$poststring);
# 连接、执行过期时间
curl_setopt($this->ch,CURLOPT_CONNECTTIMEOUT,5);
curl_setopt($this->ch,CURLOPT_TIMEOUT,30);
# 是否跟随301 302
curl_setopt($this->ch,CURLOPT_FOLLOWLOCATION,CURLOPT_MAXREDIRS,10);
# refer
curl_setopt($this->ch,CURLOPT_REFERER,$refer);
# http版本和端口重用设置
curl_setopt($this->ch,CURLOPT_HTTP_VERSION,CURL_HTTP_VERSION_1_1);
curl_setopt($this->ch,CURLOPT_FORBID_REUSE,1);
# 支持https
curl_setopt($this->ch,CURLOPT_SSL_VERIFYPEER,0);
curl_setopt($this->ch,CURLOPT_SSL_VERIFYHOST,0);
# 如果必要进行毫秒超时,必要增加：
curl_setopt($this->ch,CURLOPT_NOSIGNAL,1);
# 执行
$response = curl_exec($ch);
if(curl_errno($ch)){
  curl_error($ch);
  exit();
}
curl_close($ch);