<s>
Silex	B-Language
is	O
a	O
micro	O
web	B-Application
framework	I-Application
written	O
in	O
PHP	B-Application
and	O
based	O
on	O
Symfony	B-Language
,	O
Twig	B-Language
(	O
template	B-Application
engine	I-Application
)	O
and	O
Doctrine	O
(	O
database	B-Application
abstraction	I-Application
)	O
.	O
</s>
<s>
The	O
general	O
purpose	O
of	O
Silex	B-Language
is	O
to	O
be	O
as	O
lightweight	O
as	O
you	O
need	O
it	O
to	O
be	O
,	O
as	O
it	O
is	O
made	O
for	O
it	O
to	O
be	O
as	O
easy	O
as	O
possible	O
to	O
add	O
features	O
and	O
extend	O
the	O
Silex	B-Language
base	O
.	O
</s>
<s>
Silex	B-Language
can	O
be	O
used	O
for	O
the	O
creation	O
of	O
small	O
web	O
applications	O
(	O
e.g.	O
</s>
<s>
REST	B-Protocol
APIs	I-Protocol
)	O
as	O
this	O
is	O
the	O
main	O
case	O
for	O
micro	O
frameworks	O
,	O
however	O
Silex	B-Language
can	O
be	O
extended	O
into	O
a	O
full	O
stack	O
MVC	O
framework	O
.	O
</s>
<s>
Silex	B-Language
comes	O
in	O
two	O
available	O
versions	O
;	O
'	O
fat	O
 '	O
and	O
'	O
slim	O
 '	O
.	O
</s>
<s>
The	O
difference	O
between	O
these	O
being	O
that	O
the	O
fat	O
version	O
is	O
fully	O
featured	O
and	O
includes	O
database	B-Application
abstraction	I-Application
,	O
a	O
template	B-Application
engine	I-Application
and	O
various	O
Symfony	B-Language
components	O
.	O
</s>
<s>
Silex	B-Language
became	O
end-of-life	O
in	O
June	O
2018	O
with	O
people	O
being	O
encouraged	O
to	O
use	O
Symfony	B-Language
instead	O
.	O
</s>
<s>
The	O
base	O
feature	O
set	O
is	O
a	O
URL	O
routing	O
system	O
,	O
built-in	O
Web	B-Application
Security	I-Application
,	O
Sessions	B-Protocol
and	O
Cookies	B-Application
abstraction	O
.	O
</s>
<s>
The	O
extended	O
version	O
of	O
Silex	B-Language
features	O
integration	O
of	O
Twig	B-Language
,	O
Doctrine	O
,	O
a	O
Translation	O
service	O
for	O
translating	O
your	O
application	O
into	O
different	O
languages	O
,	O
a	O
logging	O
mechanism	O
using	O
the	O
Monolog	O
library	O
to	O
log	O
requests	O
and	O
errors	O
,	O
services	O
for	O
form	O
validation	O
and	O
generation	O
,	O
and	O
more	O
.	O
</s>
<s>
Silex	B-Language
was	O
originally	O
created	O
by	O
Fabien	O
Potencier	O
,	O
the	O
creator	O
of	O
the	O
Symfony	B-Language
framework	I-Language
,	O
and	O
Igor	O
Wiedler	O
.	O
</s>
<s>
It	O
was	O
first	O
released	O
as	O
a	O
'	O
web	B-Application
framework	I-Application
proof-of-concept	O
'	O
.	O
</s>
<s>
Silex	B-Language
was	O
at	O
its	O
time	O
one	O
of	O
the	O
best	O
known	O
micro	O
frameworks	O
for	O
PHP	B-Application
and	O
was	O
regularly	O
placed	O
among	O
the	O
fastest	O
in	O
benchmarks	O
for	O
micro	O
framework	O
comparisons	O
.	O
</s>
