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The Definitive Guide to Drupal 7 by Károly Négyesi, Claudina Sarahe, Dani Nordin, Ed Carlevale, Benjamin Melançon, Amye Scavarda, Ryan Szrama, Kay VanValkenburgh, Brian Travis, Greg Anderson, Robert Douglass, Roy Scholten, Peter Wolanin, Susan Stewart, Mike Gifford, Forest Mars, Sam Boyer, Florian Lorétan, Allie Micka, Jake Strawn, Stefan Freudenberg, Dmitri Gaskin, Bojhan Somers, Albert Albala, George Cassie, Kasey Qynn Dolin, Jacine Luisi, Dan Hakimzadeh, Robin Monks, Nathaniel Catchpole, Stéphane Corlosquet, Mike Ryan, Michelle Lauer, Greg Stout

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C H A P T E R  22

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WritingProject-Specific Code

by Florian Lorétan

One of the great strengths of Drupal is the wide selection of available modules, providing everything from the integration of external media to complex access restrictions, with many modules expanding standard functionality to fit specific use cases.

Combining existing modules can cover most of your needs, but every project is different and has unique details that are not covered by any module. This where glue code comes in—project-specific code that fills the gap between the functionality provided by existing modules and the exact requirements of your project. Glue code allows ...

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