init에서 PHP 파일 실행

Centos 6.9의 init.d에서 PHP 스크립트를 실행하려고 하는데 서비스를 시작한 터미널을 종료하면 애플리케이션이 중지되고 애플리케이션이 실행 중임에도 불구하고 애플리케이션 상태가 항상 중지된 것으로 표시됩니다.

    #!/bin/sh
    #
    # arrbot        This shell script takes care of starting and stopping
    #               the arbbot
    #
    # chkconfig: - 65 20
    # description:  arbbot trader.
    # processname: arbbot
    # Required-Start: $network $syslog $mysqld
    # Required-Stop:  $network $syslog $mysqld
    # Short-Description: start and stop arbbot server
    # Description: arbbot trader
    ### END INIT INFO

    # Source function library.
    . /etc/rc.d/init.d/functions

    NAME=arbbot
    DESC="arbbot trader"
    LOGFILE="/var/log/${NAME}.log"
    DAEMON="/usr/bin/php5"
    WORK_DIRECTORY="/var/www/arbbot/"
    DAEMON_OPTS="/var/www/arbbot/main.php"
    ARBDIR="/var/www/arbbot"
    ARBBOT="exec ${DAEMON} ${DAEMON_OPTS} > ${LOGFILE} 2>&1 > NULL"
    LOCK="/var/lock/subsys/arbbot"

    start() {
            echo -n "Starting ${DESC}: "
            cd "${WORK_DIRECTORY}"
            $ARBBOT
            RETVAL=$?
            [ $RETVAL -eq 0 ] && touch -- "$LOCK"
            return $RETVAL
    }

    stop() {
            echo -n "Shutting down arbbot: "
            killproc $ARBBOT
            rm -f $LOCK
            return
    }

    restart() {
            stop
            start
    }

    reload() {
            restart
    }

    case "$1" in
    start)
            start
            echo "$NAME."
            ;;
    stop)
            stop
            echo "$NAME."
            ;;
    status)
            status ARBBOT
            RETVAL=$?
            ;;
    restart)
            restart
            ;;
    reload)
            reload
            ;;
    *)
            echo "Usage:  {start|stop|status|reload|restart[|probe]"
            exit 1
            ;;
    esac

    exit $RETVAL