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The posting Incompatibility between footmisc-option multiple and hyperref
contains a solution to having consecutive footnote markers hyper-linked and automatically separated by raised commas.

How to have the same when there is a sequence of footnotes and footcites, such as

Textfootnote{First footnote}footcite{firstcitation}footnote{citation}

This is the solution on the linked page:

documentclass{article}

usepackage{hyperref}



letoldFootnotefootnote

newcommandnextTokenrelax



renewcommandfootnote[1]{%

    oldFootnote{#1}futureletnextTokenisFootnote}



newcommandisFootnote{%

    ifxfootnotenextTokentextsuperscript{,}fi}



textheight=3cm

begin{document}



Textfootnote{First footnote}footnote{Second footnote}footnote{Third footnote} Textfootnote{Fourth footnote} Text



end{document} 

The solution to your query involves making two additions to @Holle's code you quoted in your posting.

• First, modify the isFootnote macro to test whether the very next token is either footnote or footcite (and, if the test is "true", to instruct LaTeX to insert textsuperscript{,}).




• Second, renew the footcite macro in the same way the footnote macro has been renewed.

documentclass{article}

usepackage{biblatex} % for 'footcite' macro

usepackage[colorlinks]{hyperref}



letoldFootnotefootnote

letoldFootcitefootcite

newcommandnextTokenrelax   

renewcommandfootnote[1]{%

    oldFootnote{#1}futureletnextTokenisFootnoteOrFootcite}

renewcommandfootcite[1]{%

    oldFootcite{#1}futureletnextTokenisFootnoteOrFootcite}

newcommandisFootnoteOrFootcite{%

    ifxfootnotenextTokentextsuperscript{,}%

    elseifxfootcitenextTokentextsuperscript{,}fi%

    fi}



setlengthtextheight{3cm} % just for this example

begin{document}



Text.footnote{First footnote}footcite{An entry to be cited}footcite{Another entry to be cited}footnote{Second footnote}  

More text



end{document}