Using PHP, how can I make a cookie expire after the browser is closed?

Using PHP, how can I make a cookie expire after the browser i开发者_如何学运维s closed?

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Just don't set an expiry time. That will make it a session cookie.

This is mentioned in the documentation for the expire argument to setcookie:

If set to 0, or omitted, the cookie will expire at the end of the session (when the browser closes).