Limit php process using cpulimit program on linux boxes

gistfile1.sh

#! /bin/sh
# /etc/init.d/limitcpu
#

# Some things that run always
#

INTERVAL=30
LIMIT=75
PIDS=$(top -b -n1 -c | grep php | awk '$9>75 {print $1}')
MYPID=$(ps aux | grep /etc/init.d/limitcpu | grep -v grep | awk '{print $2}')

checkAndLimit()
{
        # Search and limit violating PIDs
        while sleep $INTERVAL
        do

           for i in $PIDS
           do
                #echo $i
                cpulimit --pid=$i -l $LIMIT -z -b  & # Limit new violating processes
                logger "$i CPU limited to $LIMIT"
           done
        done
}

# Carry out specific functions when asked to by the system
case "$1" in
  start)
    logger "$0 Starting up with check interval of $INTERVAL..."
    checkAndLimit &
    ;;
  stop)
    logger "$0 Stoping script..."
    kill -9 $MYPID
    ;;
  *)
    echo "Usage: /etc/init.d/$0 {start|stop}"
    exit 1
    ;;
esac

exit 0