PSR-2 Coding standard for arrays and method chaining?

At this stage neither of those are explicitly covered in the PSR-2 standard. In the conclusion it does note that a number of areas are intentionally omitted, including:

• Operators and assignment
• Inter-line alignment

The only relevant guidelines would be the more general ones regarding things like line lengths and number of spaces for indenting.

Other standards that do deal with those subjects include PEAR and Zend.

PSR-2 currently doesn't specify either