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php curl的基础知识

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$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, 5);   
       
# 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);   
       
# 执行   
curl_setopt($this->ch, CURLOPT_NOSIGNAL, 1);   
$response = curl_exec($ch);   
if(curl_errno($ch)){   
    curl_error($ch);   
    exit();   
}   
curl_close($ch);

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