Show a php website in fiveM

FiveM Resource Development Discussion
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Hi everyone,
I’m trying to load my PHP website inside a FiveM resource using an iframe.
However, the NUI always shows a black screen and I can’t figure out why.

My setup: The webserver runs on Plesk, the domain is from Strato, and the nameservers are managed through Cloudflare — not sure if that’s relevant.

Things I’ve tried so far:

  • Added all required iframe headers (removed X-Frame-Options, set CSP frame-ancestors *)
  • Set SameSite=None; Secure on all cookies
  • Disabled Brotli compression in Cloudflare
  • Tested with other external websites → they load correctly in the NUI
  • Tested my own site via PowerShell/cURL → returns correct headers
  • Direct access to the PHP pages works in the browser, only FiveM shows a black screen

Has anyone dealt with this issue before or knows what else I could try? Any help would be appreciated.

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Make sure you are using the Beta or Canary versions of FiveM (change from main menu settings), then you can access the NUI Tool via the F8 menu - using this you’ll get a full Chrome Dev Tools window you can use to diagnose the problem.

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Thank you. Had to change something in the .htaccess to get it workin.

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