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What’s the special meaning of sleep and wakeup?

Discussion in 'PHP' started by sparkar17, Mar 23, 2010.

sparkar17 Member

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#1

Whatâ€™s the special meaning of __sleep and __wakeup?

sparkar17, Mar 23, 2010 IP
Alex Roxon Active Member

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I quote from Matt Zandstra's PHP Objects, Patterns, and Practice:

One way of managing serialization is to implement the magic methods __sleep() and __wakeup(). _sleep() is called automatically when an object is serialized. You can use it to perform any cleaning up before the object is saved. It should return an array of strings representing the fields you would like to have saved. The __wakeup() method is invoked when an object is unserialized. You can use this to resume any file or database handles the object may have been using at the time of storage.
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Alex Roxon, Mar 23, 2010 IP

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