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This is a known issue. The CHM format manual was being manually built and has no automatic build system. Additionally it relies on software that is no longer officially available - see this issue for my adventures in trying to get it to build recently.
You may be interested to learn that the multipage HTML format now includes a basic search feature, the same as the php.net documentation.
Other than the above mentioned search capability, is there a specific reason you want the manual in CHM format?
in my case it makes my life easier. I can use the multipage, but there are no search option there. and the single page never fully open, at least in Firefox. so the basic search.. haven't seen it yet. chrome for me it's only for testing so nothing open by default there
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AllenJB commentedon Nov 10, 2025
Related to #1219 , php/doc-en#3780 (comment) and php/phd#203
This is a known issue. The CHM format manual was being manually built and has no automatic build system. Additionally it relies on software that is no longer officially available - see this issue for my adventures in trying to get it to build recently.
You may be interested to learn that the multipage HTML format now includes a basic search feature, the same as the php.net documentation.
Other than the above mentioned search capability, is there a specific reason you want the manual in CHM format?
michel-io commentedon Nov 22, 2025
in my case it makes my life easier. I can use the multipage, but there are no search option there. and the single page never fully open, at least in Firefox. so the basic search.. haven't seen it yet. chrome for me it's only for testing so nothing open by default there
so.. yes, i suppose i need it,
derickr commentedon Jan 23, 2026
We can't build this automatically any more — like @AllenJB I have tried too. The software, once you find it, also just crashes for me too.
And the multi-page download does have a search functionality.