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Closures and variable scope

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Goran Rakic
2012-07-13 21:11:09 +02:00
parent 9f40674396
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_posts/03-02-01-Programming-Paradigms.md
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@@ -53,7 +53,7 @@ print_r($output);
Closure is an anonymous function that can access variables imported from the outside scope without using any global Closure is an anonymous function that can access variables imported from the outside scope without using any global
variables. Theoretically, a closure is a function with some arguments closed (e.g. fixed) by the environment when it is variables. Theoretically, a closure is a function with some arguments closed (e.g. fixed) by the environment when it is
defined. This is used to cross variable scope restrictions in a very clean way. defined. Closures can work around variable scope restrictions in a clean way.
In the next example we use closures to define a function returning a single filter function for `array_filter`, out of In the next example we use closures to define a function returning a single filter function for `array_filter`, out of
a family of filter functions. a family of filter functions.