% !TEX TS-program = XeLaTeX
% www.parsilatex.com
\documentclass[a4paper,12pt]{article}
\usepackage{ptext}
\usepackage{lipsum}
\usepackage{xepersian}

\makeatletter
\renewcommand{\@makefntext}[1]{\parindent 1em
   \noindent\hbox to 1em{}% if you want to indent footnote text you can change the width of the hbox (e.g. \hbox to 2em{})
   \llap{\if@RTL\else\latinfont\fi\@thefnmark)\,\,}#1}
\makeatother
\begin{document}
چه بسیار اشعار زیبای فردوسی...\footnote{\ptext[1]}

\begin{latin}
This is a latin test with a latin footnote\LTRfootnote{\lipsum[1]}
\end{latin}

\end{document}