Synchronized functions using PHP

Question

How to make functions in PHP synchronized so that same function won\'t be executed concurrently ? 2nd user must wait till 1st user is done with the function. Then 2nd user

Answer 1

off the top of my head:

• function checks if a database field called isFunctionRunning is equal 1. if not start executing
• you update the database field called isFunctionRunning to 1
• function does magic here
• you update the database field called isFunctionRunning to 0

but somehow i think what you are trying to do is "wrong" and can be achieved in another way. could help if you said more details

edit: wasn't aware of php semaphores, the answer above will be way faster.