Sphider for searching keywords in PDF

Question

Can Sphider be customized for searching keywords in PDF?

I know that Sphider is written in PHP.

Answer 1

Yes. From sphider's doc:

Indexing pdf and doc files

Pdf and doc files can be indexed via external binaries. Download and install pdftotext and catdoc and set there location(path) in conf.php (note that under Windows, you should not use spaces in defining the executable's path). Additionally, in admin section, check the Index pdf and Index doc boxes (alternatively, set $index_pdf and $index_doc parameters to 1 in conf.php).