Print a block inside a Views header or Views footer using PHP input
Try this module https://www.drupal.org/project/views_block_area - it allows insert any block into the view's header or footer. 
Another way using code

$blockObject = block_load('module', 'delta');
$block = _block_get_renderable_array(_block_render_blocks(array($blockObject)));
$output = drupal_render($block);
print $output;