1. PHP / Говнокод #24811

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    /**
     * Cast an object into a different class.
     *
     * Currently this only supports casting DOWN the inheritance chain,
     * that is, an object may only be cast into a class if that class 
     * is a descendant of the object's current class.
     *
     * This is mostly to avoid potentially losing data by casting across
     * incompatable classes.
     *
     * @param object $object The object to cast.
     * @param string $class The class to cast the object into.
     * @return object
     */
    function cast($object, $class) {
    	if( !is_object($object) ) 
    		throw new InvalidArgumentException('$object must be an object.');
    	if( !is_string($class) )
    		throw new InvalidArgumentException('$class must be a string.');
    	if( !class_exists($class) )
    		throw new InvalidArgumentException(sprintf('Unknown class: %s.', $class));
    	if( !is_subclass_of($class, get_class($object)) ) 
    		throw new InvalidArgumentException(sprintf(
    			'%s is not a descendant of $object class: %s.',
    			$class, get_class($object)
    		));
    	/**
    	 * This is a beautifully ugly hack.
    	 *
    	 * First, we serialize our object, which turns it into a string, allowing
    	 * us to muck about with it using standard string manipulation methods.
    	 *
    	 * Then, we use preg_replace to change it's defined type to the class
    	 * we're casting it to, and then serialize the string back into an
    	 * object.
    	 */
    	return unserialize(
    		preg_replace(
    			'/^O:\d+:"[^"]++"/', 
    			'O:'.strlen($class).':"'.$class.'"',
    			serialize($object)
    		)
    	);
    }

    Это прекрасно.

    Запостил: gost, 25 Сентября 2018

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