Curl을 사용하여 PHP를 사용하여 로그인을 시뮬레이션하고 데이터를 캡처하는 단계에 대한 자세한 설명

$login_url = 'http://www.xxxxx';  //登录页面地址
$cookie_file = dirname(FILE)."/pic.cookie";  //cookie文件存放位置（自定义）
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $login_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_exec($ch);
curl_close($ch);

$verify_url = "http://www.xxxx";   //验证码地址
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $verify_url);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$verify_img = curl_exec($ch);
curl_close($ch);
$fp = fopen("./verify/verifyCode.png",'w');  //把抓取到的图片文件写入本地图片文件保存
fwrite($fp, $verify_img);
fclose($fp);

$ post_url = 'http://www.xxxx';   //登录表单提交地址
$post = "username=$account&password=$password&seccodeverify=$verifyCode";//表单提交的数据（根据表单字段名和用户输入决定）
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $ post_url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);     //提交方式为post
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
curl_exec($ch);
curl_close($ch);

$data_url = "http://www.xxxx";   //数据所在地址
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $data_url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,0);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
$data = curl_exec($ch);
curl_close($ch);

curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);

$UserAgent = 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; .NET CLR 3.5.21022; .NET CLR 1.0.3705; .NET CLR 1.1.4322)';
curl_setopt($curl, CURLOPT_USERAGENT, $UserAgent);