在php数组中定义并执行函数

Question

How To define and execute a function inside array

for example i have a array

    $a="a";
    $b="b";
    $c="c"; 
    $array=array(
         "a"=>$a,
         "b"=>$b,
         "c"=>function($c){
                //do something 
              return output
          }      
    )

here output should be

Array
(
    [a] => a
    [b] => b
    [c] => "new value of c"

)

but actually i am getting

Array
(
    [a] => a
    [b] => b
    [c] => Closure Object
        (
            [parameter] => Array
                (
                    [$c] => 
                )    
        )    
)

NB: i can define a function outside this and call that function inside but i dont want to do that

Answer 1

Since closure is a function and it must be executed in order to get a response. Here's how you can execute and return a response

$c = 'awesome';
$array=array(
     "a"=>'test2',
     "b"=> 'test',
     "c"=> call_user_func(function() use ($c) {
            //do something 
          return $c;
      })      
);
var_dump($array);//array(3) { ["a"]=> string(5) "test2" ["b"]=> string(4) "test" ["c"]=> string(7) "awesome" }