MT5 Authentication Process Build Through PHP, Laravel

Here's the codebase we followed in php

<?php
 
class CMT5Request
{
  private $m_curl=null;
  private $m_server="";
 
  public function Init($server)
  {
    $this->Shutdown();
    if($server==null)
      return(false);
    $this->m_curl=curl_init();
    if($this->m_curl==null)
      return(false);
    //---
    curl_setopt($this->m_curl,CURLOPT_SSL_VERIFYPEER,0); // comment out this line if you use self-signed certificates
    curl_setopt($this->m_curl,CURLOPT_MAXCONNECTS,1); // one connection is used
    curl_setopt($this->m_curl, CURLOPT_HTTPHEADER,array('Connection: Keep-Alive'));
    //---
    $this->m_server=$server;
    //---
    return(true);
  }
 
  public function Shutdown()
  {
    if($this->m_curl!=null)
        curl_close($this->m_curl);
    $this->m_curl=null;
  }
 
  public function Get($path)
  {
    if($this->m_curl==null)
      return(false);
    curl_setopt($this->m_curl,CURLOPT_POST,false);
    curl_setopt($this->m_curl,CURLOPT_URL,'https://'.$this->m_server.$path);
    curl_setopt($this->m_curl,CURLOPT_RETURNTRANSFER,true);
    $result=curl_exec($this->m_curl);
    if($result==false)
    {
      echo 'Curl GET error: '.curl_error($this->m_curl);
      return(false);
    }
    $code=curl_getinfo($this->m_curl,CURLINFO_HTTP_CODE);
    if($code!=200)
    {
      echo 'Curl GET code: '.$code;
      return(false);
    }
    return($result);
  }
 
  public function Post($path, $body)
  {
    if($this->m_curl==null)
      return(false);
    curl_setopt($this->m_curl,CURLOPT_POST,true);
    curl_setopt($this->m_curl,CURLOPT_URL, 'https://'.$this->m_server.$path);
    curl_setopt($this->m_curl,CURLOPT_POSTFIELDS,$body);
    curl_setopt($this->m_curl,CURLOPT_RETURNTRANSFER,true);
    $result=curl_exec($this->m_curl);
    if($result==false)
    {
      echo 'Curl POST error: '.curl_error($this->m_curl);
      return(false);
    }
    $code=curl_getinfo($this->m_curl,CURLINFO_HTTP_CODE);
    if($code!=200)
    {
      echo 'Curl POST code: '.$code;
      return(false);
    }
    return($result);
  }  
 
  public function Auth($login, $password, $build, $agent)
  {
    if($this->m_curl==null)
      return(false);    
    //--- send start
    $path='/api/auth/start?version='.$build.'&agent='.$agent.'&login='.$login.'&type=manager';
    $result=$this->Get($path);
    if($result==false)
      return(false);
    $auth_start_answer=json_decode($result);
    if((int)$auth_start_answer->retcode!=0)
    {
      echo 'Auth start error : '.$auth_start_answer.retcode;
      return(false);
    }
    //--- Getting code from the hex string
    $srv_rand=hex2bin($auth_start_answer->srv_rand);
    //--- Hash for the response
    $password_hash=md5(mb_convert_encoding($password,'utf-16le','utf-8'),true).'WebAPI';
    $srv_rand_answer=md5(md5($password_hash,true).$srv_rand);
    //--- Random string for the MetaTrader 5 server
    $cli_rand_buf=random_bytes(16);
    $cli_rand=bin2hex($cli_rand_buf);
    //--- Sending the response
    $path='/api/auth/answer?srv_rand_answer='.$srv_rand_answer.'&cli_rand='.$cli_rand;
    $result=$this->Get($path);
    if($result==false)
      return(false);
    $auth_answer_answer=json_decode($result);
    if((int)$auth_answer_answer->retcode!=0)
    {
      echo 'Auth answer error : '.$auth_answer_answer.retcode;
      return(false);
    }
    //--- Calculating a correct server response for the random client sequence
    $cli_rand_answer=md5(md5($password_hash,true).$cli_rand_buf);
    if($cli_rand_answer!=$auth_answer_answer->cli_rand_answer)
    {
      echo 'Auth answer error : invalid client answer';
      return(false);
    }
    //--- Everything is done
    return(true);
  }
}
 
// Example of use
$request = new CMT5Request();
// Authenticate on the server using the Auth command
if($request->Init('my.broker.com:443') && $request->Auth(1000,"Password",1985,"WebManager"))
{
  // Let us request the symbol named TEST using the symbol_get command
  $result=$request->Get('/api/symbol/get?symbol=TEST');
  if($result!=false)
  {
    echo $result;
    $json=json_decode($result);
    if((int)$json->retcode==0)
    {
      $symbol=$json->answer;
      //--- Changing the description
      $symbol->Description='My Description';
      // Sending changes to the server using the symbol_add command
      $result=$request->Post('/api/symbol/add',json_encode($symbol));
      if($result!=false)
        echo $result;
    }
  }
}
$request->Shutdown();
?>