Of course you can help to improve our documentation. There are basically two ways of doing this.
If you find any errors within this manual, in any language, please report them using the bug system at: http://bugs.php.net/. Classify the bug as "Documentation Problem". This way we can follow every bug and track the things done to eliminate them from the documentation. You can also submit format problems (eg. PHP Manual PDF displayed incorrectly). Please don't abuse the bug system by submitting requests for help, use the mailing lists or community sites mentioned above, instead.
By adding annotations to pages, you can provide more examples to readers than any single manual writer. Readers very much appreciate useable user comments. Do not submit bug reports using the annotation system please. Read more about annotations in the About user notes part.