PHP Function return data to an array
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I have few php functions that returns various data via same variable, and that variable should assign to a array. Now I want to execute function by checking `$_POST` and assign $data to `$response` multidimensional array... Is there any way to do that ???

    $functionname = $_POST['functionname'];
    
    function testOne(){
    $data = array('test'=>'value1');
    return $data;
    }
    
    function testTwo(){
    $data = array('test'=>'value2');
    return $data;
    }
    
    //Here I need to execte each functions and return $data
    
    $response = array('result' => array('response'=>'success'),'clients' => $data);
    
    print_r($response);