PHP. How to implement a shared counter between multiple scripts?

Question

linux

Several daemons (endless php loops) are constantly running on a dedicated server + new ones are periodically launched + several scripts on the crown.
To implement some algorithm, it is necessary to use a common counter for each script/process while they are running. For example:

• Daemon 1 : Counter = 1
  
• Daemon 1 : Counter = 2
  
• Daemon 3 : Counter = 3
  
• Daemon 5 : Counter = 4
  
• Daemon 2 : Counter = 5
  
• Cron 1 : Counter = 6
  
• Cron 2 : Counter = 7
  
• Daemon 2: Counter = 8
  
• Daemon 1 : Counter = 9
  
• Daemon 1 : Counter = 10
  
• Daemon 13 : Counter = 11
  
• Cron 3 : Counter = 12
  

The use of the counter value may be needed in a very short period of time between several scripts, and with each use it should be 1 more than the previous one.
I tried to maintain the value in the file - at some points the value is simply not read and everything goes astray (I could not figure out the reason)
DB ( MySql) I'm afraid to use, because the calls will be very frequent and the frequency is growing.
Please tell me the best solutions.

Answer 1

For example, like this: php.net/manual/en/memcached.increment.php

Answer 2

I tried to maintain the value in the file - at some points the value is simply not read and everything goes astray (I could not figure out the reason)

most likely a banal blocking of an open file.

I'm afraid to use a database (MySql), because the calls will be very frequent and the frequency is growing.

well, I don't know, requesting an indexed field from the database takes about 0.0013 seconds on my not the most powerful machine, + non-blocking updates. In production, there are machines processing up to ~ 100 requests per second. Another thing is that this is shooting sparrows from a cannon.
As the best option IMHO - memkesh, or radish.