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php: dynamically call overloadable function with an argument array
array_merge($array1, $array2, $array3, $array4, $array5, $array6, $array7);

public function index() {

    $head = $this->_model->title("Index Page"); // returns array

    $nav = $this->_model->navigation(); // returns array

    $default = $this->_model->default_page(); // returns array

    $data = $this->merge($head, $nav, $default); // merge all arrays

    $this->loadView( 'view_admin', $data );
}

private function merge(){
    $args = func_get_args();

    // ... do stuff the the arrays ...

    return array_merge($args[0],$args[1],$args[2]);
}

return array_merge($args[0],$args[1],$args[2]);

array_merge(/* All Array args passed in */)

return call_user_func_array('array_merge', $args);

return call_user_func("array_merge", $args);