A few well e(x)tended (o)bjects that make easy to build strictly typed arrays such as Map, Set, Tuple or any type of TypedArray's, and also String and Number's.
map
php
set
strings
numbers
arrays
arrayobject
tuple
arrayutil
typedarray
stringutil
numberutil
stringobject
numberobject
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Updated
Nov 13, 2019 - PHP