From the PHP documentation for get_class:

"In PHP 4 get_class() returns a user defined class name in

lowercase, but in PHP 5 it will return the class name in its

original notation too, just like class names from PHP extensions"



So the fix I did was to change the condition to the following.

  strtolower(get_class($mime_part)) != 'mime_part'



Dear developers:

It might be a good idea to wrap get_class with strtolower where

ever you find it for PHP5 compatibility. (Even though it

seems PHP5 is not a concern for IMP 3.)



# grep -rs "get_class(" .

IMP 3 does not support PHP 5 and never will.

IMP doesn't not display le body content of the message. I solved the 
problem in the horde/lib/Viewer.php method factory.



the method get_class($mime_part) in PHP5 probably doesn't work. I 
remove the condition and it works now.