PHP development skills (8)-Code details of CURL request

There are many ways to access remote URLs in PHP, such as using file_get_contents to obtain content; using fopen to open ur to obtain content; using fsockopen function to open url to obtain content, etc. However, the most recommended method is to use CURL for access.

<?php  
  
/** 
 * ======================================= 
 * Created by Zhihua_W. 
 * Author: Zhihua_W 
 * Date: 2016/12/12 0008 
 * Time: 下午 2:17 
 * Project: PHP开发小技巧 
 * Power: CURL请求 
 * ======================================= 
 */  
  
/** 
 * CURL请求 
 * @param $url 请求url地址 
 * @param $method 请求方法 get post 
 * @param null $postfields post数据数组 
 * @param array $headers 请求header信息 
 * @param bool|false $debug 调试开启 默认false 
 * @return mixed 
 */  
function httpRequest($url, $method, $postfields = null, $headers = array(), $debug = false)  
{  
    $method = strtoupper($method);  
    $ci = curl_init();  
    /* Curl settings */  
    curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);  
    curl_setopt($ci, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0");  
    curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 60); /* 在发起连接前等待的时间，如果设置为0，则无限等待 */  
    curl_setopt($ci, CURLOPT_TIMEOUT, 7); /* 设置cURL允许执行的最长秒数 */  
    curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);  
    switch ($method) {  
        case "POST":  
            curl_setopt($ci, CURLOPT_POST, true);  
            if (!empty($postfields)) {  
                $tmpdatastr = is_array($postfields) ? http_build_query($postfields) : $postfields;  
                curl_setopt($ci, CURLOPT_POSTFIELDS, $tmpdatastr);  
            }  
            break;  
        default:  
            curl_setopt($ci, CURLOPT_CUSTOMREQUEST, $method); /* //设置请求方式 */  
            break;  
    }  
    $ssl = preg_match(&#39;/^https:\/\//i&#39;, $url) ? TRUE : FALSE;  
    curl_setopt($ci, CURLOPT_URL, $url);  
    if ($ssl) {  
        curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, FALSE); // https请求 不验证证书和hosts  
        curl_setopt($ci, CURLOPT_SSL_VERIFYHOST, FALSE); // 不从证书中检查SSL加密算法是否存在  
    }  
    //curl_setopt($ci, CURLOPT_HEADER, true); /*启用时会将头文件的信息作为数据流输出*/  
    curl_setopt($ci, CURLOPT_FOLLOWLOCATION, 1);  
    curl_setopt($ci, CURLOPT_MAXREDIRS, 2);/*指定最多的HTTP重定向的数量，这个选项是和CURLOPT_FOLLOWLOCATION一起使用的*/  
    curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);  
    curl_setopt($ci, CURLINFO_HEADER_OUT, true);  
    /*curl_setopt($ci, CURLOPT_COOKIE, $Cookiestr); * *COOKIE带过去** */  
    $response = curl_exec($ci);  
    $requestinfo = curl_getinfo($ci);  
    $http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);  
    if ($debug) {  
        echo "=====post data======\r\n";  
        var_dump($postfields);  
        echo "=====info===== \r\n";  
        print_r($requestinfo);  
        echo "=====response=====\r\n";  
        print_r($response);  
    }  
    curl_close($ci);  
    return $response;  
    //return array($http_code, $response,$requestinfo);  
}  
  
  
$url = "http://zhutuan.chuangkeweilai.cn/jiancai/admin/index.php?act=cache&op=kppwcache";  
  
httpRequest($url, $method, $postfields = null, $headers = array(), $debug = true)  
  
?>

Related articles:

The url parameter problem when php uses curl to initiate a get request

Using curl to send requests in PHP ( GET request and POST request)

Detailed examples of precautions for PHP to use the curl function to send Post requests

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