php生成艺术签名 上

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/**
     * curl模拟http请求
     * @param array $params   参数配置
     * @return mixed   返回结果
     */
    function curlHttp($params = array()){
        error_reporting(0);
        set_time_limit(0);
        if (!$params || !$params['url']) {
            return false;
        }
        $ch = curl_init();
        $options = array(
            CURLOPT_URL => $params['url'],
            CURLOPT_RETURNTRANSFER => $params['return_transer'] ? $params['return_transer'] : 1,
            CURLOPT_TIMEOUT => $params['timeout'] ? $params['timeout'] : 100,
            CURLOPT_CONNECTTIMEOUT => 10,
            CURLOPT_HEADER => $params['show_header'] ? true : false,
            CURLOPT_HTTPHEADER => array('Expect: ')
        );
        if ($params['agent']) {
            $options[CURLOPT_USERAGENT ] = $params['agent'];
        }
        if ($params['referer']) {
            $options[CURLOPT_REFERER] = $params['referer'];
        }
        if ($params['cookie']) {
            $options[CURLOPT_COOKIE ] = $params['cookie'];
        }
        if ($params['header']) {
            $options[CURLOPT_HTTPHEADER] = $params['header'];
        }
        if ($params['cookiefile']) {
            if (!file_exists($params['cookiefile'])) {
                file_put_contents($params['cookiefile'], '');
            }
            $cookieFile = realpath($params['cookiefile']);
            $options[CURLOPT_COOKIEFILE] = $cookieFile;
            $options[CURLOPT_COOKIEJAR] = $cookieFile;
        }
        if ($params['post']) {
            $options[CURLOPT_POST] = 1;
        }
        if ($params['postdata']) {
            $options[CURLOPT_POST] = 1;
            if ($params['http_build_query']) {
                $params['postdata'] = http_build_query($params['postdata']);
            }
            $options[CURLOPT_POSTFIELDS] = $params['postdata'];
        }
        if ($params['ssl']) {
            $options[CURLOPT_SSL_VERIFYPEER] = 0;
            $options[CURLOPT_SSLVERSION] = 1;
            $options[CURLOPT_SSL_VERIFYHOST] = 1;
        }
        if ($params['ipv4']) {
            $options[CURLOPT_HTTPHEADER] = array('Expect: ');
            $options[CURLOPT_IPRESOLVE] = CURL_IPRESOLVE_V4;
        }
        curl_setopt_array($ch, $options);
        $response = curl_exec($ch);
        $errno = curl_errno($ch);
        if ($errno != 0) {
            if ($params['sync']) {
                $res[] = false;
                $res[] = $response;
                $errInfo = curl_getinfo($ch);
                $errInfo['errorno'] = $errno;
                $res[] = $errInfo;
            } else {
                $res = false;
            }
        } else {
            if ($params['sync']) {
                $res[] = true;
                $res[] = $response;
            } else {
                $res = $response;
            }
        }
        curl_close($ch);
        return $res;
    }

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 $params = array(
            'url' => 'http://www.example.com',
            'ipv4' => true,
            'post' => true,
            'referer' => 'http://www.example.com',
            //'cookie' => 'Hm_lvt_1a6016c8e736ecef523fbe2539419b5a=1468570717;Hm_lpvt_1a6016c8e736ecef523fbe2539419b5a=1468570772',
            'postdata' => array(
                'id'=>$content,
                'id1607'=>'pihun',
                'id1606'=>'jiqie',
                'id1608'=>'jiqie_com',
                'id1'=>'901',
                'id2'=>'15',
                'id3'=>'#000000',
                'id4'=>'',
                'id5'=>'',
                'id6'=>'',
            ),
            'agent' => 'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.89 Safari/537.36'
        );

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//$res返回的是网页的源码，其中要获取的签名图片地址是<img src="../image/4232.jpg" />是使用相对路径来指定url的。

 $res = $this->curlHttp($params);//这里是返回的网页源码字符串

 $domain = strstr($res, '..');//获取$res中..后面的字符串
 $domain = strstr($domain, '"',true);//获取$domain中"后面的字符串
 $start = strpos($domain,'..');//获取..开始的位置
 $domain = substr_replace($domain,"http://www.example.com",$start,2);//将..替换为域名