How to schedule events in PHP - php

Question

I am creating a processing system in PHP, I read tons of tutorials over the internet but nothing
seems to satisfy what I need for my system.
I have table SCHEDULE in SQL..
+----+------+---------------------+
| ID | Name | Description |
+----+------+---------------------+
| | | |
| 1 | D | Daily |
| 2 | W | Weekends |
| 3 | EOM | End Of the month |
| 4 | 11d | 11 day of the month |
| 5 | M | Monday |
+----+------+---------------------+
And Table PROCESS..
+----+---------------+-----------+
| ID | Schedule_id | Name |
+----+---------------+-----------+
| 1 | 1 | Process 1 |
| 2 | 2 | Process 2 |
| 3 | 3 | Process 3 |
+----+---------------+-----------+
What I want is to automatically show the process on each days base on their schedule.
Meaning:
if Process1 = D RUN Process1 everyday
if Process2 = W RUN ONLY Process2 on weekends
if Process3 = 11d RUN ONLY Process3 on the 11th day of the month
I also want them to store on my calendar and also how about holidays?
All answers will be appreciated thanks.

Answer 1

I understand that activities don't have an associated schedule, so you can be at any given time. Taking that as a starting point, you can run a cronjob, every day, through a script in PHP which being entrusted to compare the tasks that the day should be made and there using shell_exec() php function to run the process in bash or in what you have defined.
That is:
For each record in "sheduled" you compare the date (If today, tomorrow or the weekend) and if there is a match, run the associated process.