This is the documentation for concrete5 version 5.6 and earlier. View Current Documentation

To modify what extensions the app will take:

First, go into concrete/config/base.php, and copy the line that looks like this:

(the exact extensions may be somewhat different)

define('UPLOAD_FILE_EXTENSIONS_ALLOWED', '*.flv;*.jpg;*.gif;*.jpeg;*.docx;*.xla;*.png;*.swf;*.doc;*.txt;

Paste or remove any extensions from this list for files you want to allow or disallow.

Then, paste this line into config/site.php.

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