How to organize the logic of the parser?

Question

PHP

For example, there is a table

The goal is to parse the pages, in small chunks, like 5 at a time.
What is the easiest way to mark already parsed urls in order to select the next block?
They should be parsed endlessly, that is, they all parsed, started from the beginning, several times a day.

Answer 1

Add one more column - status.
Choose 5 values ​​that have status 0, if there are none, then update all status to 0 and start over, and if there are, then parse and write to status 1.
And of course, set up cron to run the script every 5 minutes or as you wish

Answer 2

If you need to parse each URL only N times in a certain time, then add the "created" field with UNIX Timestamp (or parse from the date that already exists) and check how much time has passed since the last check, update the date accordingly, and set the cron, for example every minute, then everything will be up to date at the specified time)

Answer 3

I'm the only one who doesn't understand, why is the cycle bad? (make a timer after every 5 - if you need it that way)
Working time is the same, the result is the same ... and put it in krones
Depends on the project and what information you get + for what.
For example, make a database with an id and a link to sites that need to be parsed. (By id there will be a cycle).
So it will be: List of links with id + task in the crown. Easy)