Assigning a symbol for footnote in shade box

Question

After looking at this Post I am still wondering how can I change the footnote in a shade box. The code is shown below:

\documentclass[a4paper,12pt]{report}
\usepackage{amsmath}
\usepackage{array}
\usepackage{fancybox}

\begin{document}

\newenvironment{boxedlaw}[1]
  {\begin{Sbox}\begin{minipage}{#1‎}‎}
  {\end{minipage}\end{Sbox}\begin{center}\shadowbox{\TheSbox}\end{center}}

\renewcommand*{\thefootnote}{\fnsymbol{footnote}}

\begin{boxedlaw}{\textwidth}
This is just a simple text to fill in the line. You notice that if I put a footnote here
\footnote{This is the foot note}
the shape or numbering used would be out of my control.How can I control that?
 \end{boxedlaw}

 \end{document}

the result would be a footnote with letter "a" in my texLive.

How can I change it to an ordinary number footnote and specially how can I make it continue from the last footnote? {I mean, if I have footnote number 2 as the last footnote, it show me the footnote number 3 and the other footnotes after it continue as usual.

I took a look at this Post but doesn't look promising.

Answer 1

minipages have its own counter

\documentclass[a4paper,12pt]{report}
\usepackage{amsmath}
\usepackage{array}
\usepackage{fancybox}

\newenvironment{boxedlaw}[1]
  {\begin{Sbox}\begin{minipage}{#1‎}‎\setcounter{mpfootnote}{\value{footnote}}}
  {\end{minipage}\end{Sbox}\begin{center}\shadowbox{\TheSbox}
   \setcounter{footnote}{\value{mpfootnote}}\end{center}}

\renewcommand*\thempfootnote{\arabic{mpfootnote}}

\begin{document}

foo\footnote{foo}

\begin{boxedlaw}{\textwidth}
This is just a simple text to fill in the line. You notice that if I put a footnote here
\footnote{This is the foot note}
the shape or numbering used would be out of my control.How can I control that?
 \end{boxedlaw}

bar\footnote{bar}

 \end{document}