Or just use HTML, CSS, and JavaScript?
Or just use HTML, CSS, and JavaScript?
Those are good building blocks but they're simply not sufficient if you are building a 'Web App' and not a 'Website'.
Also I'll cut off the inevitable, "The web was not built for this and it shouldn't become a place for apps." The world disagrees, I disagree and most people developing on the web disagree.
And I'll raise that we should be moving more towards the web being the best universal distribution platform for software.
We're talking about internal tooling for businesses here, this isn't necessary at all.
I disagree with the person you're responding to, PHP and HTML should be more than enough for such things.
Why treat internal 'customers' any differently than forward facing ones? Building great internal tools can dramatically improve your teams' workflows and solve meaningful business problems.