unable to connect to sftp server using php

Question

I want to connect to sftp server. Code I am using is..

$connection = ssh2_connect('hostip');
if (!ssh2_auth_password($connection, 'username', 'password')) {
throw new Exception('Unable to connect.'); }
if (!$sftp = ssh2_sftp($connection)) {
throw new Exception('Unable to create SFTP connection.'); } 

But showing error as_

This page isn’t working. currently unable to handle this request. HTTP ERROR 500

Main Purpose of doing so is - I want to access file filename.txt from sample.php

Path is_ /var/data/hostdata/myadmin/public_html/new1/new2/sample.php

& want to access

/var/data/vmail/updates.com/admin/curDir/filename.txt

But PHP is mapped till /var/data/hostdata/myadmin/public_html

So unable to get proper path. That's the reason I want to create new sftp connection

Answer 1

At first try connection via ssh2(command prompt), after that check your iptables and firewalld, an again check your log files from client and server side, if you come out of the internet behind a firewall then check roles.