array_filter with a callback function

Question

$thisQuestion = array_filter($pollQuestions,function($q) use ($questDataArr){
                      return $questDataArr[0] == $q["id"];
                    });

As I am using 2 variables here I was using this inline function . How can i create a callback function and pass extra parameter ?

You pass extra parameters with use(), like you have done. It would help if you showed us what those data types looked like. — Galen
– Galen, Commented Sep 2, 2011 at 21:57

Galen · Accepted Answer · 2011-09-02 23:32:34Z

2

If I understand your question correctly:

you don't want to use an anonymous function
you need a function that keeps some state with it

The solution is to create a class:

class MyCallback {
    private $questDataArr;
    public function __construct($questDataArr) {
        $this->questDataArr = $questDataArr;
    }
    function callback($q) {
        return $this->questDataArr[0] == $q["id"];
    }
}

array_filter($pollQuestions, array(new MyCallback($questDataArr), 'callback'));

edited Sep 2, 2011 at 23:32

Galen

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answered Sep 2, 2011 at 22:07

Arnaud Le Blanc

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