square(feed) - phpMan

csqrt (3)            - complex square root
csqrt (3p)           - complex square root functions
csqrtf (3)           - complex square root
csqrtl (3)           - complex square root
sqrt (3)             - square root function
sqrt (3p)            - square root function
sqrtf (3)            - square root function
sqrtl (3)            - square root function