PHP cURL初始化和执行方法入门级代码

这个是采集基础，最好熟悉一下

$ch = curl_init();# 设定url和把结果返回，是否返回头部curl_setopt($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postcurl_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($this->ch, CURLOPT_TIMEOUT, 30);# 是否跟随301 302curl_setopt($this->ch, CURLOPT_FOLLOWLOCATION, 1);curl_setopt($this->ch, CURLOPT_MAXREDIRS, 10);# refercurl_setopt($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($this->ch, CURLOPT_FORBID_REUSE, 1);# 支持httpscurl_setopt($this->ch, CURLOPT_SSL_VERIFYPEER, 0);curl_setopt($this->ch, CURLOPT_SSL_VERIFYHOST, 0);# 如果需要进行毫秒超时，需要增加：curl_setopt($this->ch, CURLOPT_NOSIGNAL, 1);# 执行$response = curl_exec($ch);if(curl_errno($ch)){  curl_error($ch);  exit();}curl_close($ch);