flow | Iterator Nirvana for PHP

flow is a PHP library. flow has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Flow provides a fluent interface to assemble chains of iterators and other data processing operations. The fluent API makes it very easy and intuitive to use the native SPL iterators (together with some custom ones provided by this library) and the expressive syntax allows you to assemble sophisticated processing pipelines in an elegant, terse and readable fashion. An iteration chain assembled with this builder can perform multiple transformations over a data flow without storing in memory the resulting data from intermediate steps. When operating over large data sets, this mechanism can be very light on memory consumption. Inputs to the chain can be any kind of iterables. Iterables are things that can be converted to iterators. They can be native arrays, Traversables (classes implementing the native Iterator or IteratorAggregate intefaces), invoked generator functions (on PHP>=5.5) or even callables (ex. Closures). Flow allows you to write generator functions using common functions on PHP<5.5, using the FunctionIterator class.