  We have systematically searched for the phase curves among the planets
discovered by \textit{K2}. Using the reported planetary parameters, we screen
out the best potential candidates, and examine their light curves in detail.
For our work, we consider light curves from two different detrending pipelines
- \texttt{EVEREST} and \texttt{K2SFF}. In order to remove stellar variability
and systematics, we test three different filtering techniques: spline, phasma
(median-filtering) and Butterworth (harmonics filtering), and use Butterworth
filtered light curves for the subsequent analysis. We have identified 6
previously unreported phase curves among the planets observed with \textit{K2}:
K2-31b, HATS-9b, HATS-11b, K2-107b, K2-131b, and K2-106b. The first four of
these are hot Jupiters for which we find the photometric masses consistent with
their RV-based masses within 2$\sigma$, 1$\sigma$, 1$\sigma$, and 3$\sigma$
respectively with comparatively low geometric albedos, while the last two are
ultra-short period super-Earths with phase curves dominated by reflective and
thermal components. We also detect a secondary eclipse in HATS-11b at 62$\pm$12
ppm. We thus deem it to be possible to validate the planetary nature of
selected \textit{K2}, and suggest similar vetting could be used for the ongoing
\textit{TESS} mission.
