Recall that a space $X$ is called basically disconnected  if every cozero-set has an open closure. According to Tkačuk , a space $X$ said to be $b$-discrete if every countable subset of $X$ is closed (equivalently, closed and discrete) and $C^∗$-embedded in $X$. Note that if $X$ is basically disconnected then $X$ is $b$-discrete .
Every $b$-discrete space $X$ with countable injective weight is basically disconnected?
 L. Gillman, M. Jerison, Rings of continuous functions, The University Series in Higher Mathematics. Princeton, New Jersey: D. Van Nostrand Co., Inc., 1960. 300 p
 V.V. Tkachuk, The spaces $C_p(X)$: decomposition into a countable union of bounded subspaces and completeness properties, Topology and its Applications, n 22, (1986), 241–253