PHP -blocking the multi login

Can anyone please tell how to block multi login in a php-mysql based site. And is there any way to keep the record when a user logs out of the site . I t seems impossible as [url removed, login to view] script cant work when there is line drop or disconnection

## Deliverables

1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased.

## Platform


Habilidades: Vale Tudo

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Acerca do Empregador:
( 1 comentário ) Singapore

ID do Projeto: #2960222