Installing PHP is covered thoroughly in the PHP documentation.
Binaries are available for Microsoft Windows. The PHP project does not currently release binary packages for other platforms such as Linux or macOS, but they are packaged by distributions and other providers. For more information, see:
The releases are tagged and signed in the PHP Git Repository. The following official GnuPG keys of the current PHP Release Manager can be used to verify the tags:
pub rsa4096 2021-04-01 [SC] 1198 C011 7593 497A 5EC5 C199 286A F1F9 8974 69DC uid [ultimate] Pierrick Charron <pierrick@php.net> sub rsa4096 2021-04-01 [E] pub rsa4096 2016-11-25 [SC] AFD8 691F DAED F03B DF6E 4605 63F1 5A9B 7153 76CA uid [ultimate] Eric A Mann <eric@sixthree.me> uid [ultimate] Eric A Mann <eric@eamann.com> uid [ultimate] Eric A Mann <eric@eam.me> uid [ultimate] Eric Mann <ericmann@php.net> sub rsa4096 2016-11-25 [S] sub rsa4096 2016-11-25 [E] sub rsa4096 2016-11-25 [A] pub ed25519 2021-04-10 [SC] C28D937575603EB4ABB725861C0779DC5C0A9DE4 uid [ultimate] Jakub Zelenka <bukka@php.net> uid [ultimate] Jakub Zelenka <jakub.openssl@gmail.com> uid [ultimate] Jakub Zelenka <jakub.zelenka@gmail.com> sub cv25519 2021-04-10 [E]
pub rsa4096 2021-04-01 [SC] 1198 C011 7593 497A 5EC5 C199 286A F1F9 8974 69DC uid [ultimate] Pierrick Charron <pierrick@php.net> sub rsa4096 2021-04-01 [E] pub rsa4096 2021-04-26 [SC] [expires: 2025-11-24] 39B6 4134 3D8C 104B 2B14 6DC3 F9C3 9DC0 B969 8544 uid [ultimate] Ben Ramsey <ramsey@php.net> sub rsa4096 2021-04-26 [E] [expires: 2025-11-24] pub rsa4096 2021-03-26 [SC] [expires: 2030-03-26] E609 13E4 DF20 9907 D8E3 0D96 659A 97C9 CF2A 795A uid [ultimate] Sergey Panteleev <sergey@php.net> uid [ultimate] Sergey Panteleev <sergey@s-panteleev.ru> uid [ultimate] Sergey Panteleev <sergey@sergeypanteleev.com> sub rsa4096 2021-03-26 [E] [expires: 2025-03-26]
pub 2048R/31CBD89E 2016-12-08 Key fingerprint = 5289 95BF EDFB A719 1D46 839E F9BA 0ADA 31CB D89E uid Joe Watkins <krakjoe@php.net> pub rsa4096 2021-04-26 [SC] [expires: 2025-11-24] 39B6 4134 3D8C 104B 2B14 6DC3 F9C3 9DC0 B969 8544 uid [ultimate] Ben Ramsey <ramsey@php.net> sub rsa4096 2021-04-26 [E] [expires: 2025-11-24] pub rsa4096 2021-04-01 [SC] F1F6 9223 8FBC 1666 E5A5 CCD4 199F 9DFE F6FF BAFD uid [ultimate] Patrick Allaert <patrickallaert@php.net> sub rsa4096 2021-04-01 [E]
A full list of GPG keys used for current and older releases is also available.