Hallo,
Sicher, Lesen bildet:
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an expiration time
This is a time/date string (in a special GMT format) that indicates when a cookie expires. The cookie will be saved and returned to your script until this expiration date is reached if the user exits the browser and restarts it. If an expiration date isn't specified, the cookie will remain active until the user quits the browser.
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Ich danke vielmals!
Gruß
Carsten Holbach