思路：將字符串重定向追加到文件中，再獲取出來
echo 'string11111111' >> replay_html.log
#讀取文件每一行
while read line
do
echo "string22222222" >> replay_html.log
echo $line >> replay_html.log
echo "string3333333333" >> replay_html.log
done < $1
echo "string end" >> replay_html.log
file_html=`cat replay_html.log`