How does php exec work?

Question

PHP

Hi guys.
Maybe a dumb question, how exactly does php exec work?
I pass some command to it, which deals with video conversion.
How does the php script work? does it wait for the end of the work or how to make it wait, for example, to change some data in the database after successful execution?

Answer 1

In general, it waits for execution:
For video conversion, it is better to use queues or workers. For example Gearman .