phploc

phploc is cool tool, by Sebastian Bergmann, to check the size of your php project. You can install it with PEAR. The short version of the installation goes like this:
// add PEAR channel
user@host ~ % pear channel-discover pear.phpunit.de
// install phploc
user@host ~ % pear install phpunit/phploc
// run
user@host ~ % phploc /path/to/your/project/code/folder

For more detailed instructions and system requirements, here is the link.

Now we are going to play a little honesty game:
Run the tool against your php project library code
[user@host] phploc ./library/Zend/
phploc 1.0.0 by Sebastian Bergmann.
Directories: 285
Files: 1372
Lines of Code (LOC): 275436
Comment Lines of Code (CLOC): 130251
Non-Comment Lines of Code (NCLOC): 145185
Interfaces: 53
Classes: 1321
Functions/Methods: 9170

Run the tool against your php project own code:
[user@host] phploc ./my_application/my_modules/
phploc 1.0.0 by Sebastian Bergmann.
Directories: 30
Files: 85
Lines of Code (LOC): 6644
Comment Lines of Code (CLOC): 580
Non-Comment Lines of Code (NCLOC): 6064
Interfaces: 0
Classes: 94
Functions/Methods: 284

Now calculate the percentage of your code vs. your favorite framework library codepercentage = my_code_NCLOC/my_library_NCLOC*100in my case the result is 4.17% !!! :) :) How about in your project?