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Copy new paragraph by @jeremeamia from main page to content page

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Goran Rakic
2012-07-20 02:40:04 +03:00
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@@ -14,6 +14,9 @@ on iteration.
New anonymous functions (with support for closures) are present since PHP 5.3 (2009).
PHP 5.4 added the ability to bind closures to an object's scope and also improved support for callables such that they
can be used interchangeably with anonymous functions in almost all cases.
The most common usage of higher-order functions is when implementing a strategy pattern. Built-in `array_filter`
function asks both for the input array (data) and a function (a strategy or a callback) used as a filter function on
each array item.