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Editorial Team
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Asked: 2026-05-13T10:18:52+00:00

I know PHP scripts can run concurrently, but I notice that when I run

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I know PHP scripts can run concurrently, but I notice that when I run a script and then run another script after it. It waits for the first to finish and then it does what it has to do?

Is there an Apache config I have to change or do I use a different browser or something?!!

Thanks all

EDIT

If I go to a different browser, I can access the page/PHP script I need?! Is this limiting the number of requests by browser? Apache?

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1 Answer

  1. Editorial Team

    Two things comes to mind:

    1. HTTP 1.1 has a recommend maximum limit of 2 simultaneous connections to any given domain. This would exhibit the problem where you can only open one page on a site at a time unless you switch browsers.
      Edit: This is usually enforced by the client, not the server

    2. If your site uses sessions, you’ll find out that only one page will load at a time…
      …unless you call session_write_close(), at which point the second page can now open the now-unlocked session file.

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