#!/bin/bash

PATH=/home/user/php/check_join.php
NAME="php $PATH"
EXIST=$(/bin/ps -C php -o cmd=)
if [ "$EXIST" = "$NAME" ]; then
  echo Running
else
  echo Starting
  /usr/bin/php $PATH
fi

*/10 * * * * /home/user/scripts/check_join.sh

*/10 * * * *  /usr/bin/pgrep -f check_join.php &>/dev/null || /path/to/command