may be you could try with things like this one :
http://kevin.vanzonneveld.net/techblog/article/create_daemons_in_php/
Is for do one daemon with php and later configure it as you want. Other possibility is crontab and with it execute one file each 1m,2m,...( execute contrab -e for edit it and crontab -l for see it ) :
*/1 * * * * /usr/bin/php /Users/rfanjul/Public/inversia/app/console twitter:hashtags:get
the last option is create one bash file like this one:
tiempo="10s"
comando="sensors"
fich_salida="temperatura.txt"
while [ true ]; do
sleep $tiempo
echo ///////////////////////// >> $fich_salida
echo ///////////////////////// >> $fich_salida
date >> $fich_salida
echo ///////////////////////// >> $fich_salida
$comando >> $fich_salida
echo ///////////////////////// >> $fich_salida
done
For you i think that the better solution is crontab with this configuration:
* 1 * * * file