<s>
The	O
PHP	B-Language
Standard	I-Language
Recommendation	I-Language
(	O
PSR	O
)	O
is	O
a	O
PHP	B-Application
specification	O
published	O
by	O
the	O
PHP	B-Application
Framework	O
Interop	O
Group	O
.	O
</s>
<s>
Similar	O
to	O
Java	B-Language
Specification	I-Language
Request	I-Language
for	O
Java	B-Language
,	O
it	O
serves	O
the	O
standardization	O
of	O
programming	O
concepts	O
in	O
PHP	B-Application
.	O
</s>
<s>
The	O
PHP-FIG	O
is	O
formed	O
by	O
several	O
PHP	B-Application
frameworks	O
founders	O
.	O
</s>
<s>
N/A	O
N/A	O
N/A	O
Deprecated	O
and	O
substituted	O
by	O
PSR-4	O
PSR-1	O
Basic	O
Coding	O
Standard	O
It	O
comprises	O
what	O
should	O
be	O
considered	O
the	O
standard	O
coding	O
elements	O
that	O
are	O
required	O
to	O
ensure	O
a	O
high	O
level	O
of	O
technical	O
interoperability	O
between	O
shared	O
PHP	B-Application
code	O
.	O
</s>
<s>
It	O
does	O
so	O
by	O
enumerating	O
a	O
shared	O
set	O
of	O
rules	O
and	O
expectations	O
about	O
how	O
to	O
format	O
PHP	B-Application
code	O
.	O
</s>
<s>
Paul	O
M	O
.	O
Jones	O
Phil	O
Sturgeon	O
Larry	O
Garfield	O
Accepted	O
PSR-5	O
PHPDoc	B-Language
Standard	O
The	O
main	O
purpose	O
of	O
this	O
PSR	O
is	O
to	O
provide	O
a	O
complete	O
and	O
formal	O
definition	O
of	O
the	O
PHPDoc	B-Language
standard	O
.	O
</s>
<s>
This	O
PSR	O
deviates	O
from	O
its	O
predecessor	O
,	O
the	O
de	O
facto	O
PHPDoc	B-Language
Standard	O
associated	O
with	O
phpDocumentor	O
1.x	O
,	O
to	O
provide	O
support	O
for	O
newer	O
features	O
in	O
the	O
PHP	B-Application
language	I-Application
and	O
to	O
address	O
some	O
of	O
the	O
shortcomings	O
of	O
its	O
predecessor	O
.	O
</s>
<s>
This	O
allows	O
objects	O
to	O
support	O
each	O
other	O
in	O
a	O
constructive	O
fashion	O
,	O
furthering	O
cooperation	O
between	O
different	O
PHP	B-Application
projects	O
.	O
</s>
<s>
Lukas	O
Kahwe	O
Smith	O
Larry	O
Garfield	O
Korvin	O
Szanto	O
Abandoned	O
PSR-11	O
Container	O
Interface	O
It	O
describes	O
a	O
common	O
interface	O
for	O
dependency	B-Library
injection	I-Library
containers	O
.	O
</s>
<s>
Michael	O
CullumKorvin	O
SzantoAlexander	O
MakarovAcceptedPSR-13Hypermedia	O
LinksIt	O
describes	O
common	O
interfaces	O
for	O
representing	O
a	O
hypermedia	O
link.Larry	O
GarfieldMatthew	O
Weier	O
O’PhinneyMarc	O
AlexanderAcceptedPSR-14Event	O
ManagerIt	O
describes	O
common	O
interfaces	O
for	O
dispatching	O
and	O
handling	O
events.Larry	O
GarfieldAcceptedPSR-15HTTP	O
Server	O
Request	O
HandlersIt	O
describes	O
common	O
interfaces	O
for	O
HTTP	O
server	O
request	O
handlers	O
and	O
HTTP	O
server	O
middleware	O
components	O
that	O
use	O
HTTP	O
messages.Woody	O
GilkMatthew	O
Weier	O
O’PhinneyAcceptedPSR-16Simple	O
CacheIt	O
describes	O
a	O
simple	O
yet	O
extensible	O
interface	O
for	O
a	O
cache	O
item	O
and	O
a	O
cache	O
driver.Paul	O
DragoonisJordi	O
BoggianoFabien	O
PotencierAcceptedPSR-17HTTP	O
FactoriesIt	O
describes	O
a	O
common	O
standard	O
for	O
factories	O
that	O
create	O
PSR-7	O
compliant	O
HTTP	O
objects.Woody	O
GilkMatthew	O
Weier	O
O’PhinneyAcceptedPSR-18HTTP	O
ClientIt	O
describes	O
a	O
common	O
interface	O
for	O
sending	O
HTTP	O
requests	O
and	O
receiving	O
HTTP	O
responses.Tobias	O
NyholmSara	O
GolemonAcceptedPSR-19PHPDoc	O
tagsIt	O
provides	O
a	O
complete	O
catalog	O
of	O
tags	O
in	O
the	O
PHPDoc	B-Language
standard.Chuck	O
BurgessDraftPSR-20Clock	O
It	O
provides	O
a	O
standard	O
way	O
of	O
accessing	O
the	O
clock	O
-	O
allowing	O
interopability	O
during	O
testing	O
,	O
when	O
testing	O
behavior	O
that	O
has	O
timing	O
based	O
side	O
effects	O
.	O
</s>
<s>
The	O
PHP-FIG	O
official	O
website	O
has	O
the	O
PSR	O
documentation	O
that	O
follows	O
the	O
RFC	O
2119	O
written	O
by	O
Scott	O
Bradner	O
in	O
March	O
1997	O
at	O
Harvard	O
University	O
.	O
</s>
