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Timothy Boronczyk's Blog:
Currying in PHP
July 10, 2009 @ 13:33:18

Timothy Boronczyk has posted about an interesting concept you could use in your applications - currying (made possible in PHP 5.3.x and above):

What happens if you don't have all the arguments handy for a function, but you want to give whatever arguments you do have now and then provide the rest of them to the function later? This is called currying, and is a core concept in functional programming. It's messy, but possible to curry functions in PHP now that closures have been added.

He starts with an example from OCaml/F# to illustrate the point and moves to a PHP example - changing a normal function that requires three parameters into one that makes it possible to only submit the parameters you'd want to use. He also includes a more "real life" example of how it could be used in array filtering.

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