Forget Haystack vs Needle order, the object IS the Haystack. Haystack is a library that allows for pipelining, immutable structures, and UTF-8 strings.
Haystack is installable as a Composer package:
$ composer require ericpoe/haystack$ git clone ...
$ composer install
$ vendor/bin/phpunitTrying to remember commonly-used PHP functions for strings and arrays in PHP is hard. Are array functions
haystack-needle and string functions needle-haystack, or vice versa? Quick, without looking at documentation or using
a decent IDE, which is correct: in_array($needle, $haystack) or in_array($haystack, needle)?
Also, even though many of the same kinds of functions are run against arrays and strings, the function names are
wildly different. strstr and in_array do similar things, yet have different names and are called in
different manners.
This project will attempt to match as many string and array verbs as possible. For example, $foo->contains("elvis")
should determine if the string "elvis" is contained in the $foo object, it shouldn't matter if $foo is a string or
an array. Ditto $foo->map($callable) and $foo->filter($callable).
Check out the manual for all the things you can do with the Haystack library.