<s>
appserver.io	B-Language
is	O
an	O
application	B-Application
server	I-Application
for	O
PHP	B-Application
based	O
web	O
environments	O
.	O
</s>
<s>
The	O
project	O
consists	O
of	O
middleware	B-General_Concept
which	O
delivers	O
classical	O
PHP	B-Application
web	O
applications	O
and	O
provides	O
additional	O
services	O
.	O
</s>
<s>
The	O
basic	O
idea	O
of	O
a	O
WildFly	B-Language
equivalent	O
for	O
PHP	B-Application
was	O
present	O
within	O
TechDivision	O
well	O
before	O
July	O
2013	O
when	O
development	O
on	O
the	O
project	O
began	O
,	O
due	O
to	O
technical	O
shortcomings	O
of	O
the	O
PHP	B-Application
language	I-Application
.	O
</s>
<s>
At	O
that	O
time	O
the	O
possibility	O
of	O
a	O
non-blocking	O
,	O
socket-based	O
PHP	B-Application
middleware	B-General_Concept
was	O
given	O
by	O
using	O
an	O
asynchronous	O
event	O
driven	O
workflow	O
or	O
forked	O
processes	B-Operating_System
.	O
</s>
<s>
In	O
parallel	O
,	O
as	O
of	O
August	O
2012	O
,	O
a	O
threading	B-Operating_System
extension	O
for	O
PHP	B-Application
by	O
Joe	O
Watkins	O
enabled	O
true	O
POSIX	O
compatible	O
multithreading	B-Operating_System
.	O
</s>
<s>
Controversially	O
threads	B-Operating_System
were	O
used	O
because	O
they	O
allow	O
the	O
programmer	O
to	O
account	O
for	O
hardware	O
usage	O
instead	O
of	O
relying	O
on	O
the	O
used	O
runtime	O
environment	O
and	O
enable	O
easier	O
communication	O
between	O
parallel	O
working	O
batches	O
.	O
</s>
<s>
After	O
deciding	O
on	O
the	O
technical	O
blueprint	O
,	O
development	O
began	O
on	O
the	O
GitHub	B-Application
platform	O
.	O
</s>
<s>
,	O
the	O
project	O
consisted	O
of	O
36	O
separate	O
repositories	B-General_Concept
,	O
around	O
80,000	O
lines	O
of	O
code	O
and	O
estimated	O
effort	O
of	O
18	O
years	O
(	O
COCOMO	O
model	O
)	O
.	O
</s>
<s>
Appserver.io	B-Language
is	O
open-source	B-Application
software	I-Application
under	O
the	O
OSL	B-License
in	O
version	O
3.0	O
.	O
</s>
<s>
It	O
can	O
be	O
downloaded	O
either	O
as	O
an	O
installable	O
package	O
from	O
the	O
project	O
page	O
,	O
or	O
as	O
a	O
source	O
from	O
GitHub	B-Application
.	O
</s>
<s>
,	O
the	O
Professional	O
Edition	O
could	O
only	O
be	O
used	O
within	O
the	O
Microsoft	B-Application
Azure	I-Application
cloud	O
service	O
and	O
offers	O
additional	O
developer	O
support	O
.	O
</s>
<s>
Appserver.io	B-Language
includes	O
a	O
runtime	O
environment	O
,	O
containing	O
PHP	B-Application
extended	O
with	O
external	O
libraries	O
,	O
PHP	B-Application
extensions	O
and	O
service	O
daemons	O
.	O
</s>
<s>
It	O
is	O
an	O
out-of-the-box	O
runtime	O
environment	O
for	O
PHP	B-Application
development	O
.	O
</s>
<s>
The	O
use	O
of	O
a	O
multithreading	B-Operating_System
environment	O
is	O
considered	O
to	O
break	O
the	O
so-called	O
shared	B-Operating_System
nothing	I-Operating_System
concept	O
of	O
PHP	B-Application
as	O
it	O
allows	O
for	O
inter-process	O
communication	O
on	O
object	O
level	O
.	O
</s>
<s>
Together	O
with	O
the	O
bundled	O
runtime	O
,	O
appserver.io	B-Language
bundles	O
administration	O
.	O
</s>
<s>
Appserver.io	B-Language
offers	O
servlets	B-Application
,	O
objects	O
that	O
persist	O
between	O
client	O
requests	O
.	O
</s>
<s>
Appserver.io	B-Language
offers	O
an	O
Enterprise	B-Language
Bean	I-Language
implementation	O
similar	O
to	O
Enterprise	B-Language
Java	I-Language
Beans	I-Language
functionality	O
.	O
</s>
<s>
Appserver.io	B-Language
offers	O
modular	O
services	O
that	O
can	O
be	O
used	O
individually	O
by	O
internal	O
and	O
external	O
applications	O
.	O
</s>
<s>
Appserver.io	B-Language
allows	O
component-based	O
scalability	O
.	O
</s>
<s>
an	O
HTTP	B-Protocol
webserver	O
)	O
are	O
adjustable	O
in	O
size	O
and	O
number	O
based	O
on	O
an	O
XML	B-Protocol
configuration	O
file	O
.	O
</s>
<s>
Additional	O
components	O
can	O
be	O
configured	O
for	O
remote	O
access	O
,	O
allowing	O
for	O
distributed	B-Architecture
systems	I-Architecture
and	O
component	O
replication	O
.	O
</s>
<s>
,	O
appserver.io	B-Language
was	O
in	O
an	O
early	O
stage	O
of	O
development	O
.	O
</s>
<s>
The	O
project	O
provided	O
tested	O
,	O
pre-release	O
versions	O
over	O
GitHub	B-Application
.	O
</s>
<s>
Appserver.io	B-Language
follows	O
a	O
naming	O
convention	O
based	O
on	O
major	O
and	O
minor	O
version	O
numbers	O
.	O
</s>
