Dear Customer,
This is to update you The PHP versions PHP 5.6 and PHP 7.0 have reached EOL.
Netspace (India) will stop supporting the above-listed PHP version and will support PHP 7.3. from Dec 15, 2019.
Each version you care about should have a changlog link. Click on it, search for 'deprecated`.
There are actually only 2 files one changelog for php4 version and one for php 5 version.
http://php.net/ChangeLog-4.php
http://php.net/ChangeLog-5.php
Heck, if you get ambitious just write a crawler script in php to pull the pages and parse out the deprecated lines.
Once you're through correcting all the php 4 to 5.6 differences, take a look at migrating to php 7 (see my note at the top about running with deprecation notices):
http://php.net/manual/en/migration70.incompatible.php
Though some see it as a negative, PHP has been painfully rigorous at maintaining quite a lot of backward compatibility, so I don't expect much to be off if you're moving to PHP 5.3 or even 5.4 (around when they started deprecating a bunch of older php stuff).
If you are a Linux Shared Hosting Customer or Windows Shared Hosting Check if your CPanel or Plesk Panel support PHP Change Version option or else contect or support team.
We recommend placing a support ticket before Dec 15 2019 and make sure you are running latest PHP 7.3 Version to aviod issue of depriciated version.
If you are a dedicated server customer (Managed) we request you to open a ticket and upgrade your PHP version.
Important : after DEC 15 2019 we will not support PHP version lower then 7.3 and your website may break if it using older version of PHP.