项和对象默认将它们的发布日期设置为当前时间(使用PHPtime函数)。
Entries and objects will set their published date to the current date (using the PHP time function) by default. Listing 6 shows the base class for entries.
定义一个接口，此接口用于设置当前选定的工具箱项以及指示设计器是否支持特定的工具箱项。
Defines an interface for setting the currently selected toolbox item and indicating whether a designer supports a particular toolbox item.
如果未指定项的压缩方法，使用默认的压缩方法。如果项没有设置修改时间，则使用当前时间。
The default compression method will be used if no compression method was specified for the entry, and the current time will be used if the entry has no set modification time.
如果未指定项的压缩方法，使用默认的压缩方法。如果项没有设置修改时间，则使用当前时间。
The default compression method will be used if no compression method was specified for the entry, and the current time will be used if the entry has no set modification time.
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