Richard Lynch schreef:
On Fri, January 25, 2008 1:45 pm, Jochem Maas wrote:
Richard Lynch schreef:
On Fri, January 25, 2008 11:33 am, Floor Terra wrote:
I know how to do multiple queries - the key issue in my
question
was how to do them concurrently (i.e. in parallel).
So you want to make PHP multithreaded???
No, just the mysql queries.
Try pcntl_fork() to create a child process for each query.
Each child can make it's own MySQL connection.
Do *NOT* do this in a web-server environment, unless you have
EXTENSIVELY and EXHAUSTIVELY tested all your PHP extensions for
thread-safety!
I agree about the don't do that part - but what has process forking
got to do with thread safety?
AFAIK you shouldn't do that because it madness to fork a complete
apache
process.
Process forking has EVERYTHING to do with thread safety.
Whatever is going to go wrong in a threaded environment is going to
also go wrong when you fork the process, almost for sure.
"Global" variables (or other resources) will not get split/duplicated
correctly, as fork has NO IDEA what needs separating.
So you suddenly have two processing pounding data in/out of what each
of them think is an exclusive resource/memory-address/whatever...
shows what I know :-)
Baby go Boom!
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