This paper introduces an online coordination approach for plug-in hybrid electric vehicles (PHEVs) charging in smart hybrid AC/DC distribution systems. The goal of the proposed method is to optimally charge the PHEVs in order to maximize the PHEV owners' satisfaction without violating the network constraints. The charging costs, which represent the PHEV owners' satisfaction in this work, are based on real-time pricing. The proposed approach includes consideration of PHEV owners' requirements, PHEV batteries' characteristics, and hybrid distribution system limitations. Moreover, a sliding window concept is introduced to facilitate managing the PHEV charging and the system interlinking converters in real-time. A 38-bus test system has been modified to include DC links and used to validate the developed online charging scheme. The test results clearly demonstrate the effectiveness of the proposed method.