Passing object method to array_map()

Question

    class theClass{
         function doSomeWork($var){
            return ($var + 2);
         }

         public $func = \"doSomeWork\";

         function theFunc         


        

Answer 1

To use object methods with array_map(), pass an array containing the object instance and the method name. For same-object scope, use $this as normal. Since your method name is defined in your public $func property, you can pass $this->func. This applies to most functions that accept a callback as an argument.

As a side note, the parentheses outside array_map() aren't necessary.

return array_map(array($this, $this->func), range($min, $max));

Answer 2

The following code provides an array of emails from an $users array which contains instances of a class with a getEmail method:

    if(count($users) < 1) {
        return $users; // empty array
    }
    return array_map(array($users[0], "getEmail"), $users);