how to add local pdf link to html code example

Example: href to specific local pdf page -html

All hyperref/pdfLaTeX can do is insert a link of a certain form. It's up to the PDF
viewer what to do with that link, and I don’t think there’s a standard link format
for pages of external PDF files. Even if some viewers have implemented something for
this, it wouldn’t be a robust solution.

My suggestion would be to actually include the linked-to PDF in the PDF you’re
creating, and then you can use features of the pdfpages package to insert hyperlink
targets for the included pages, and then you can use internal links. A quick example:

\documentclass{article}
\usepackage{pdfpages}
\usepackage{hyperref}
\begin{document}
Here's a \hyperlink{included.pdf.2}{link to to page 2 of the included pdf}.
\includepdf[pages=1-5,link=true]{included.pdf}
\end{document}