PHP5 __sleep To Handle Superclasses' Private Members

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class Object {
    function __sleep() {
        return array_keys( (array)$this );
    }
}

class BaseClass extends Object {
    private $foo;
    private $dbh; // some resource, like a database handler
    function __sleep() {
        unset($this->dbh);
        return parent::__sleep();
    }
}

class SubClass extends BaseClass {
    private $bar;
    function __sleep() {
        return parent::__sleep();
    }
}

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Tags:
• oop
• php
• php5