From https://www.jetbrains.com/phpstorm/webhelp/file-templates.html:
File templates are written in the Velocity Template Language (VTL).
And apparently VTL predefines time as ${TIME}
/**
* Created by ${PRODUCT_NAME}.
* User: ${USER}
* Date: ${DATE}
* Time: ${TIME}
* To change this template use File | Settings | File Templates.
*/
For Live Templates, see https://www.jetbrains.com/phpstorm/webhelp/live-templates.html
Go to the Live Templates. Create a new entry named t (or whatever you want) and put $TIME$
into the Template Text box. Set the context to PHP. Then click "Edit Variables" and select time()
as the expression. Apply the changes. Next time you hit tab-t it will insert the current time.
However, when you want this to "keep a track of the changes in the code", then why not just use a Version Control System, like Git, Mercurial or SVN to keep track of the changes. Then you don't need the time in the DocBlock at all.