PHP: define own server variable -


i've found own superglobal variable in php? here says there no way somehow define/use "server variable" same different users/sessions. but since few years has passed may has changed? , such possible?

basically want run php script triggered user event, don't want run more e.g. once per 30mins. frst thought keep "server side var (that visibles sessions/clients)" , if user trigger event (e.g. open page) check if script been running last 30 mins open page, if no before opening page e.g. purge outdated/passed things.

yes understand can workaround mysql etc... why workaroud if php support need.

thank in advance!

a regular php variable cannot persisted beyond current execution of script. once script ends, variables gone. that's basic nature of php; in fact it's basic nature of computer programs, it's php typically terminated quickly. persist data beyond single script invocation, have several options store data:

  • a database
  • a file
  • shared memory (though may purged @ time)
  • a memory cache memcached (basically in-memory database server)
  • run persistent php script , communicate via sockets (basically memcache)
  • don't terminate script, write daemon

nothing of has changed recently.


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