The book is written using ReStructured Text and generated using Sphinx.

• RST manual: http://docutils.sourceforge.net/docs/ref/rst/restructuredtext.html
• RST quickref: http://docutils.sourceforge.net/docs/user/rst/quickref.html
• Sphinx manual: https://www.sphinx-doc.org/en/master/

The following "coding style" applies to the written text, not to the included code.

• The maximum line-width for text is 120 characters.
• The maximum line-width for code is 98 characters. Including the four space indentation this would be a limit of 102 characters. This is a hard limit that prevents overflows in the PDF version.
• Indentation uses four spaces.
• Lines should not have trailing whitespace.
• Punctuation like ?, ! or : should directly follow after the word (e.g. foo: rather than foo :).

These domains have been bought by Anthony to publish info about the book:

• phpinternalsbook.com
• phpcorebook.com
• insidephpbook.com

Only the first domain is currently in use.

• Julien Pauli: [email protected]
• Nikita Popov: [email protected]
• Anthony Ferrara: [email protected]