Disable client-side media processing in Playground#75950
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adamsilverstein wants to merge 1 commit intotrunkfrom
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Disable client-side media processing in Playground#75950adamsilverstein wants to merge 1 commit intotrunkfrom
adamsilverstein wants to merge 1 commit intotrunkfrom
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WordPress Playground runs PHP via WebAssembly (php-wasm) inside iframes. Client-side media processing requires cross-origin isolation headers (COOP/COEP) that conflict with this iframe architecture, causing the editor to crash. Check PHP_SAPI for 'wasm' and return false early to fall back to server-side processing in Playground environments.
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@brandonpayton just merged a temporary fix that disables client-side media processing in Playground, so there's no need to disable it inside Gutenberg. We plan to enable client-side media processing in Playground once we solve the root cause of the issue. |
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OK thanks for the update. I'll close this for now. |
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Summary
PHP_SAPI === 'wasm'check togutenberg_is_client_side_media_processing_enabled()that returnsfalseearly in WordPress Playground environmentsHow it works
WordPress Playground runs PHP via WebAssembly (php-wasm), which registers its SAPI as
"wasm". By checkingPHP_SAPIbefore applying the filter, all CSM infrastructure is disabled: nowindow.__clientSideMediaProcessing = trueflag, no COOP/COEP headers, andlib/media/load.phpearly-returns.Closes #75941
Test plan
vendor/bin/phpunit phpunit/media/media-processing-test.php🤖 Generated with Claude Code