Getting more and more into javascript coding, two tools I found I could not do without are JSMin and JSlint, from Douglas Crockford.
On the JSmin webpage, a php version is available for download, but it did not fit my needs really well (in fact, the js version did, but, being a php-head, I got that one first), so I patched it a bit:

1. made all the code work with PHP 4 (removed usage of splfileiterator, exceptions are replaced by triggering errors, class constants are turned into global constants, etc…)
2. constant VERSION changed to JSMIN_VERSION to avoid name clashes
3. added a new function to class JSMin to cleanly separate writing to output stream from parsing
4. make sure that newline chars passed inside the comments parameter do not break output
5. the file can now be included in a php app (whether cli or web hosted) and used as library (just define JSMIN_AS_LIB before including jsmin.php)
6. when used as library, the class can operate on php strings instead of files
7. i could not resist the urge to remove excess whitespace here and there in the php source, too (phpmin-syndrome???)

The new code is available here. Take a look at the comments inside for more info.

There is some other (php) work done on jsmin from a guy named Ed Eliot there

A very well kept secret: I had done very few to not-at-all javascript development until now. My personal philosophy can be summed up as “if it can be done on the server, do it on the server”.

Alas, I have at last succumbed to the ajax craze, and waded knee-deep into the murky javascript pools, in search for diamond and pearls and api-compatible library reimplementations.
Not only have I discovered that translating php into javascript is almost as simple as translating “->” into “.”, “.” into “+” and “gettype” into “typeof”, but my mind got bended and warped forever while trying to rationalize the prototype-based inheritance model.

If the result of such perilous journeys has been something of interest, I let the readers judge.
For now, the visible part is a graphical editor of xmlrpc / json values, added to the online xmlrpc debugger available here: http://gggeek.damacom.it/debugger/ (to see it, click on ‘Execute method’ then on the ‘Edit’ link).