can i play a playstation using my laptop monitor? if so how?

Answer:

no, you cannot. the laptop cannot be connected to the playstation and vice-versa.
no you can't
I'm going to answer no, contained by that most laptop connectors are proprietary, meaning manufactured to a design specific to merely one brand. It is unlikely and highly doubtful that you would find a standard D15 connector, which could be used in conjunction near a signal conversion box, to display PAL or NTSC format video from your playstation. And that has even begin to address the power issue.