function get_url($url) {
        //请求地址
        // $curl_url = $url;

        $ch = curl_init();
        //生成随机ip
        $ip = mt_rand(11, 191) . "." . mt_rand(0, 240) . "." . mt_rand(1, 240) . "." . mt_rand(1, 240);
        //生成浏览器
        $agent_array = [
            //PC端的UserAgent
            "safari 5.1 – MAC" => "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11",
            "safari 5.1 – Windows" => "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-us) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50",
            "Firefox 38esr" => "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0",
            "IE 11" => "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; InfoPath.3; rv:11.0) like Gecko",
            "IE 9.0" => "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0",
            "IE 8.0" => "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)",
            "IE 7.0" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)",
            "IE 6.0" => "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)",
            "Firefox 4.0.1 – MAC" => "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0.1) Gecko/20100101 Firefox/4.0.1",
            "Firefox 4.0.1 – Windows" => "Mozilla/5.0 (Windows NT 6.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1",
            "Opera 11.11 – MAC" => "Opera/9.80 (Macintosh; Intel Mac OS X 10.6.8; U; en) Presto/2.8.131 Version/11.11",
            "Opera 11.11 – Windows" => "Opera/9.80 (Windows NT 6.1; U; en) Presto/2.8.131 Version/11.11",
            "Chrome 17.0 – MAC" => "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_0) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11",
            "傲游（Maxthon）" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Maxthon 2.0)",
            "腾讯TT" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; TencentTraveler 4.0)",
            "世界之窗（The World） 2.x" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)",
            "世界之窗（The World） 3.x" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; The World)",
            "360浏览器" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; 360SE)",
            "搜狗浏览器 1.x" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; SE 2.X MetaSr 1.0; SE 2.X MetaSr 1.0; .NET CLR 2.0.50727; SE 2.X MetaSr 1.0)",
            "Avant" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Avant Browser)",
            "Green Browser" => "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)",
            //移动端口
            "safari iOS 4.33 – iPhone" => "Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5",
            "safari iOS 4.33 – iPod Touch" => "Mozilla/5.0 (iPod; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5",
            "safari iOS 4.33 – iPad" => "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5",
            "Android N1" => "Mozilla/5.0 (Linux; U; Android 2.3.7; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",
            "Android QQ浏览器 For android" => "MQQBrowser/26 Mozilla/5.0 (Linux; U; Android 2.3.7; zh-cn; MB200 Build/GRJ22; CyanogenMod-7) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",
            "Android Opera Mobile" => "Opera/9.80 (Android 2.3.4; Linux; Opera Mobi/build-1107180945; U; en-GB) Presto/2.8.149 Version/11.10",
            "Android Pad Moto Xoom" => "Mozilla/5.0 (Linux; U; Android 3.0; en-us; Xoom Build/HRI39) AppleWebKit/534.13 (KHTML, like Gecko) Version/4.0 Safari/534.13",
            "BlackBerry" => "Mozilla/5.0 (BlackBerry; U; BlackBerry 9800; en) AppleWebKit/534.1+ (KHTML, like Gecko) Version/6.0.0.337 Mobile Safari/534.1+",
            "WebOS HP Touchpad" => "Mozilla/5.0 (hp-tablet; Linux; hpwOS/3.0.0; U; en-US) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 TouchPad/1.0",
            "UC标准" => "NOKIA5700/ UCWEB7.0.2.37/28/999",
            "UCOpenwave" => "Openwave/ UCWEB7.0.2.37/28/999",
            "UC Opera" => "Mozilla/4.0 (compatible; MSIE 6.0; ) Opera/UCWEB7.0.2.37/28/999",
            "微信内置浏览器" => "Mozilla/5.0 (Linux; Android 6.0; 1503-M02 Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/37.0.0.0 Mobile MQQBrowser/6.2 TBS/036558 Safari/537.36 MicroMessenger/6.3.25.861 NetType/WIFI Language/zh_CN",
            // ""=>"",
        ];
        //要得到类似这样useranget 可以自定义
        //$user_agent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11";
        $user_agent = $agent_array[array_rand($agent_array, 1)];  //随机浏览器useragent

        //构造ip
        $header = array(
            'CLIENT-IP:' . $ip,
            'X-FORWARDED-FOR:' . $ip,
        );

        curl_setopt($ch, CURLOPT_URL, $url); //请求地址
        curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_USERAGENT, $user_agent); //模拟常用浏览器的$user_agent
        $page_content = curl_exec($ch);
        curl_close($ch);
        return $page_content;
        //打印返回信息
        // echo '<per/>';
        // echo $page_content;
    }

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