array_map / create_function

<?php
class Bar
{
  public function test() {
    $ar = array( 1, 2, 3, 4, 5 );

    //$result = array_map( array(& $this, 'func'), $ar );
    $result = array_map( create_function('$x', 'return $x * $x;'), $ar );
    
    echo '<pre>'; print_r( $result ); echo '</pre>';
  }
  
  private function func( $x ) {
    return $x * $x;
  }
}

$b = new Bar();
$b->test();
?>