#!/bin/sh
#
# rename files that meet a certain pattern
#
# cut method takes the name before the first . 
#  and then leaves it to add the extention of your choice
#  in the last mv command
# sed method has greater flexibility. can rename any part of 
#  the name. not sure if i've tested it
#
for i in photo_?.*html
  do 
  # two possible ways to do this. cut or sed
  j=`echo $i | cut -f1 -d '.'`
  #newname=`echo $i | sed -e 's/shtml/php/'`
  #
  echo $j.php
  #echo $newname
  #
  # I will used the cut method
  mv $i $j.php
  #mv $i $newname

done