Order of files in a FileSet (phing)

Question

Is it possible to get the files from a phing FileSet in a specific order (0-9 followed by A-Z for example)? Right now it is taking my numbered files in a completely random order.

<fileset dir="${mydirectory}">
    <include name="*" />
</fileset>

Answer 1

<exec command="cd ${mydirectory}/ &amp;&amp; echo *" escape="false" outputProperty="myfiles" />
<append destfile="concatenated.txt">
    <filelist dir="${mydirectory}" files="${myfiles}" />
</append>