php inline callback

Question

A quick question.

Is it possible to declare the callback function inline, in php? For example,

array_filter($input_array, "function($item) { $item['state'] != 0 }")

Answer 1

Yes, after php 5.3, you could use anonymous function.

array_filter($input_array, function($item) { return $item['state'] != 0; });

Answer 2

Sure it calls anonymous functions:

array_filter($input_array, function($item) { 
    return $item['state'] != 0;
});