Function file code delete button

function wp_delete_post_link($link = 'Delete This', $before = '', $after = '')
{
global $post;
if ( $post->post_type == 'page' ) {
if ( !current_user_can( 'edit_page', $post->ID ) )
return;
} else {
if ( !current_user_can( 'edit_post', $post->ID ) )
return;
}
$link = "url') . "/wp-admin/post.php?action=delete&post=" . $post->ID, 'delete-post_' . $post->ID) . "'>".$link."";
echo $before . $link . $after;
}