<?php

$curl = curl_init();
curl_setopt_array($curl, array(
	CURLOPT_URL => "http://qldt.actvn.edu.vn/CMCSoft.IU.Web.Info/Login.aspx",
	CURLOPT_ENCODING=>"",
	CURLOPT_RETURNTRANSFER => true,
	CURLOPT_USERAGENT=>"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36",
	CURLOPT_HEADER=> true,
	CURLOPT_TIMEOUT => 30
));
$response = curl_exec($curl);

$preg='/name="__VIEWSTATE" id="__VIEWSTATE" value="(.*?)" \/>/';
if(preg_match($preg, $response, $match)){
	$__VIEWSTATE=$match[1]; // get viewstate 
}

$preg='/name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="(.*?)" \/>/';
if(preg_match($preg, $response, $match)){
	$__EVENTVALIDATION=$match[1];  //get eventvalydation 
}

// những input cần submit 

$__VIEWSTATE=urlencode($__VIEWSTATE);
$__EVENTVALIDATION=urlencode($__EVENTVALIDATION);
$user='CT030324';
$pass=md5('17/10/2000');
$btnSubmit=urlencode('Đăng nhập');


// request post tới trang login 

curl_setopt_array($curl, array(
	CURLOPT_URL => "http://qldt.actvn.edu.vn/CMCSoft.IU.Web.Info/Login.aspx",
	CURLOPT_ENCODING=>"",
	CURLOPT_FOLLOWLOCATION =>true,
	CURLOPT_POST=>true,
	CURLOPT_CUSTOMREQUEST => "POST",
	CURLOPT_RETURNTRANSFER => true,
	CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
	CURLOPT_USERAGENT=>"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36",
	CURLOPT_HEADER=> true,
	CURLOPT_HTTPHEADER => array(
		"Content-Length: 0"
	),
	CURLOPT_TIMEOUT => 30,
	CURLOPT_POSTFIELDS=>"__VIEWSTATE=".$__VIEWSTATE."&__EVENTVALIDATION=".$__EVENTVALIDATION."&txtUserName=".$user."&txtPassword=".$pass."&btnSubmit=".$btnSubmit.""
));
$response = curl_exec($curl);
var_dump($response);

?>