泛用的curl封装函数

<?php
function curl_it($url = "", $first_call = true, $additional_header = NULL, $post = NULL, $put = NULL, $return_header = false, &$http_code = NULL, $basic_authentication = NULL, $proxy = NULL, $cookie = 'cookiefile', $follow_location = true, $timeout = 15)
{
    if ($cookie == 'cookiefile')
        $cookie = $_SERVER['DOCUMENT_ROOT'].'/cache/cookie/shop/cookie-curl_it.php';
    $curl_max_loops = 5;
    $html = $redirect_url = "";
    static $curl_loop_counter = 0;
    if ($first_call)
        $curl_loop_counter = 0;
    $curl_loop_counter++;
    
    if ($curl_loop_counter >= $curl_max_loops)
        return $html;
    
    if (strlen($url) > 0)
    {
        $ch = curl_init();
        
        if (!is_null($proxy))
        {
            curl_setopt($ch, CURLOPT_PROXYAUTH, CURLAUTH_BASIC);
            curl_setopt($ch, CURLOPT_PROXY, constant(strtoupper($proxy).'_PROXY'));
            curl_setopt($ch, CURLOPT_PROXYPORT, constant(strtoupper($proxy).'_PROXYPORT'));
            curl_setopt($ch, CURLOPT_PROXYUSERPWD, constant(strtoupper($proxy).'_PROXYUSERPWD'));
        }
        
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            //curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie);
            curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie); # SAME cookiefile
            curl_setopt($ch, CURLOPT_ENCODING, '');
            $header = array();
            if (!is_null($additional_header) && is_array($additional_header))
                $header = $additional_header;
            if (!in_array('Pragma', $header)) $header[] = 'Pragma: no-cache';
            if (!in_array('Cache-Control', $header)) $header[] = 'Cache-Control: no-cache';
            if (!preg_grep('/^Accept\-Language:/i', $header)) $header[] = "Accept-Language: en-US,en;q=0.5";
            if (!preg_grep('/^Expect:/i', $header)) $header[] = "Expect:";    //HTTP/1.1 100 Continue <- sucks
            if (!preg_grep('/^Accept:/i', $header)) $header[] = "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
            if (!preg_grep('/^Accept\-Encoding/i', $header)) $header[] = "Accept-Encoding: gzip, deflate";
            if (!preg_grep('/^User\-Agent:/i', $header)) $header[] = "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0";
            curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 8);
            curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
            if (!is_null($post))
            {
                curl_setopt($ch, CURLOPT_POST, 1);
                //this is already a finished post string
                //rawurlencode kills it!
                //recurse($post, '$value=rawurlencode($value)');
                curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
            }
            if (!is_null($put))
            {
                if ($put == 'DELETE')
                {
                    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'DELETE');
                    curl_setopt($ch, CURLOPT_POSTFIELDS, '');
                }
                elseif ($put == 'OPTIONS')
                {
                    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'OPTIONS');
                    curl_setopt($ch, CURLOPT_POSTFIELDS, '');
                }
                else
                {
                    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
                    curl_setopt($ch, CURLOPT_POSTFIELDS, $put);
                }
            }
            if (!is_null($basic_authentication))
            {
                //username:password
                //nor username or password can be emtpy
                if (preg_match('/.+:.+/', $basic_authentication))
                    curl_setopt($ch, CURLOPT_USERPWD, $basic_authentication);
            }
            curl_setopt($ch, CURLOPT_URL, $url);
            $response = curl_exec($ch);
            //remove proxy header
            $pattern = '~^HTTP/1\.(0|1) 200 Connection established~i';
            if (preg_match($pattern, $response))
            {
                $response = ltrim(preg_replace($pattern, '', $response));
                $ar_pattern = array(    '~^Transfer\-Encoding\: chunked~i',
                    '~^Proxy\-agent\: Online_Application~i',
                    '~^Connection: close~i');
                foreach ($ar_pattern as $pattern)
                {
                    if (preg_match($pattern, $response))
                        $response = ltrim(preg_replace($pattern, '', $response));
                }
            }
            //list($header, $html) = explode("\r\n\r\n", $response, 2);
            list($header, $html) = preg_split("/\R{2}/", $response, 2);
            $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            if ($follow_location && ($http_code == 301 || $http_code == 302 || $http_code == 307))        //permanently moved || found || temporary redirect
            {
                $matches = array();
                //preg_match('/Location:(.*?)\n/', $header, $matches);
                //$c_url = @parse_url(trim(array_pop($matches)));
                $c_url = false;
                if (preg_match('/Location:(.*?)($|\R)/', $header, $matches))
                    $c_url = parse_url(trim($matches[1]));
                if ($c_url)
                {
                    $last_url = parse_url(curl_getinfo($ch, CURLINFO_EFFECTIVE_URL));
                    if (!$c_url['scheme'])
                        $c_url['scheme'] = $last_url['scheme'];
                    if (!$c_url['host'])
                        $c_url['host'] = $last_url['host'];
                    if (!$c_url['path'])
                        $c_url['path'] = $last_url['path'];
                    if (!$c_url['fragment'])
                        $c_url['fragment'] = $last_url['fragment'];
                    $redirect_url = $c_url['scheme'].'://'.$c_url['host'].$c_url['path'].($c_url['query'] ? '?'.$c_url['query'] : '').($c_url['fragment'] ? '#'.$c_url['fragment'] : '');
                }
            }
            curl_close($ch);
            if (strlen($redirect_url) > 0)    //redirect
            $html = j_curl_it($redirect_url, false, $additional_header, $post, $put, $return_header, $http_code, $basic_authentication, $proxy, $cookie, $follow_location, $timeout);
        }
        
        return ($return_header ? $header."\r\n\r\n" : "").$html;
    }