<s>
sabre/dav	O
is	O
an	O
open	B-License
source	I-License
WebDAV	B-Protocol
server	O
,	O
developed	O
by	O
fruux	B-Application
and	O
built	O
in	O
PHP	B-Application
.	O
</s>
<s>
It	O
is	O
an	O
implementation	O
of	O
the	O
WebDAV	B-Protocol
protocol	O
(	O
with	O
extensions	O
for	O
CalDAV	B-Protocol
and	O
CardDAV	B-Protocol
)	O
,	O
providing	O
a	O
native	O
PHP	B-Application
server	O
implementation	O
which	O
operates	O
on	O
Apache	B-Application
2	I-Application
and	O
Nginx	B-Operating_System
web	O
servers	O
.	O
</s>
<s>
Provides	O
a	O
complete	O
framework	O
for	O
providing	O
virtual	O
or	O
filesystem-based	O
WebDAV	B-Protocol
server	O
implementations	O
.	O
</s>
<s>
Passes	O
the	O
complete	O
WebDAV	B-Protocol
Litmus	O
test	O
suite	O
.	O
</s>
<s>
Includes	O
plugins	O
for	O
CalDAV	B-Protocol
and	O
CardDAV	B-Protocol
support	O
.	O
</s>
<s>
sabre/dav	O
requires	O
PHP	B-Application
version	O
7.1	O
.	O
</s>
