Replace shortcode with its output in all posts

replace_shortcode_with_output.php

function get_replaced_sourcecode_sc( $post ) {
  if ( empty($post) ) global $post;
  if ( empty($post) || ! isset($post->post_content) ) return false;
  $content = $post->post_content;
  if (
    preg_match_all( '/'. get_shortcode_regex() .'/s', $post->post_content, $matches )
    && array_key_exists( 2, $matches ) && in_array( 'purehtml', $matches[2] )
  ) {
    foreach ( $matches[2] as $i => $sc ) {
      if ( $sc == 'purehtml' )
        $now = $matches[0][$i];
        $replace = do_shortcode($now);
        $content = str_replace( $now, $replace, $content );
    }
  }
  return $content;
}

function replaced_sourcecode_sc_all() {


   $all = get_posts(array( 'posts_per_page' => -1, 'post_type' => 'post' ));

    if ( ! empty($all) ) {
    global $wpdb;
      foreach ( $all as $one ) {

        $content = get_replaced_sourcecode_sc( $one );

        if(strcmp($content, $one->post_content) !== 0){
			  $query = "UPDATE ".$wpdb->prefix."posts SET post_content='".$content."' WHERE ID = '".$one->ID."'";
			$wpdb->query($query);
        }

      }
    }
}

add_action('shutdown', 'replaced_sourcecode_sc_all');