PHP RFC: Your Title Here

• Version: 0.9
• Date: 2021-03-20
• Author: Max Semenik, maxsem.wiki@gmail.com
• Status: Draft
• First Published at: http://wiki.php.net/rfc/iterator_chaining

The elevator pitch for the RFC. The first paragraph of this section will be slightly larger to give it emphasis; please write a good introduction.

trait IteratorChain {
    public function skip(int $count): LimitIterator {}
    public function regexFilter(string $regex, int $mode = RegexIterator::MATCH, int $flags = 0 , int $preg_flags = 0): RegexIterator {}
    public function callbackFilter(callable $callback): CallbackIterator {}
    public function noRewind(): NoRewindIterator {}
    public function cached(int $flags = CachingIterator::CALL_TOSTRING): CachingIterator {}
    public function multiple(int $flags = MultipleIterator::MIT_NEED_ALL|MultipleIterator::MIT_KEYS_NUMERIC): MultipleIterator {}
}

What breaks, and what is the justification for it?

8.1.

Should not impact existing functionality (other than making some of it easier to use).

Need to

List existing areas/features of PHP that will not be changed by the RFC.

This helps avoid any ambiguity, shows that you have thought deeply about the RFC's impact, and helps reduces mail list noise.

This section details areas where the feature might be improved in future, but that are not currently proposed in this RFC.

Include these so readers know where you are heading and can discuss the proposed voting options.

Links to any external patches and tests go here.

If there is no patch, make it clear who will create a patch, or whether a volunteer to help with implementation is needed.

Make it clear if the patch is intended to be the final patch, or is just a prototype.

For changes affecting the core language, you should also provide a patch for the language specification.

After the project is implemented, this section should contain

1. the version(s) it was merged into
2. a link to the git commit(s)
3. a link to the PHP manual entry for the feature
4. a link to the language specification section (if any)

Links to external references, discussions or RFCs

Keep this updated with features that were discussed on the mail lists.