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...m code to be executed when some defined action (such as saving a page or a user logging in) is performed. ...hor of a feature, you want to allow an extension to disallow or cancel the user action, you can provide an abortable hook for this. ...

...m code to be executed when some defined action (such as saving a page or a user logging in) is performed.</translate> ...hor of a feature, you want to allow an extension to disallow or cancel the user action, you can provide an abortable hook for this. ...