previousruntime=0
while :
do
today=`date -d @$(( $(date +"%s") - 1 )) +%s`
if [ $previousruntime == 0 ];
then
    previousruntime=$today
else
    echo $today $previousruntime
    ((count = today - previousruntime))
    if [ $count -gt 600 ];
    then
        echo 'limiting data to max 10 minutes'
        let previousruntime=($today-600)
    fi
fi
  
/usr/bin/php /var/www/html/102pushdata/102livedatamysql.php $today $previousruntime 

previousruntime=$today

sleep 20
done