PHP_cURL初始化和执行方法

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, 1);

curl_setopt($this->ch, 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);