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\part{Global constants and objects}
Horde applications work with a standard set of constants:

\begin{tabular}{|l|l|}
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\textbf{HORDE\_BASE} & The filesystem location of Horde\\
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\textbf{[APP]\_BASE} & The filesystem location of the application's base (\textbf{[APP]} = name of current application)\\
\hline
\textbf{[APP]\_TEMPLATES} & The filesystem location of the application's template files (\textbf{[APP]} = name of current application)\\
\hline
\end{tabular}
Applications work with a number of standard global variables and object:

\begin{tabular}{|l|l|}
\hline
\textbf{\$browser} & Information on the client browser (Horde\_Browser object)\\
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\textbf{\$cli} & CLI object (Horde\_Cli object; only if running in CLI mode)\\
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\textbf{\$conf} & The configuration hash\\
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\textbf{\$injector} & The injector instance; used to inject dependencies into various framework libraries (Horde\_Injector object)\\
\hline
\textbf{\$language} & The user's preferred language\\
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\textbf{\$notification} & The notification handler (Horde\_Notification object)\\
\hline
\textbf{\$page\_output} & The page output helper object (\textbf{Horde 5 only}) (Horde\_PageOutput object)\\
\hline
\textbf{\$prefs} & The user preferences (Horde\_Prefs object)\\
\hline
\textbf{\$registry} & The Horde Registry\footnote{http://example.com/index.php?page=Doc/Dev/Registry} (Horde\_Registry object)\\
\hline
\end{tabular}
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