在函数内部获取变量并用于启动另一个函数

Question

我在提交HTML表单时调用了以下函数，类似于send_msg($user_N, $body_input, $subject_input);

function send_msg($user_id, $title, $message){
$args = array( 'recipients' => $user_id, 'sender_id' => bp_loggedin_user_id(), 'subject' => $title, 'content' => $message );
messages_new_message1( $args );
}

function messages_new_message1( $args = '' ) {

  // Parse the default arguments.
  $r = bp_parse_args( $args, array(
    'sender_id'  => bp_loggedin_user_id(),
    'thread_id'  => false,   // False for a new message, thread id for a reply to a thread.
    'recipients' => array(), // Can be an array of usernames, user_ids or mixed.
    'subject'    => false,
    'content'    => false,
    'date_sent'  => bp_core_current_time(),
    'error_type' => 'bool'
  ), 'messages_new_message' );

  // Bail if no sender or no content.
  if ( empty( $r['sender_id'] ) || empty( $r['content'] ) ) {
    if ( 'wp_error' === $r['error_type'] ) {
      if ( empty( $r['sender_id'] ) ) {
        $error_code = 'messages_empty_sender';
        $feedback   = __( 'Your message was not sent. Please use a valid sender.', 'buddypress' );
      } else {
        $error_code = 'messages_empty_content';
        $feedback   = __( 'Your message was not sent. Please enter some content.', 'buddypress' );
      }

      return new WP_Error( $error_code, $feedback );

    } else {
      return false;
    }
  }

  // Create a new message object.
  $message            = new BP_Messages_Message;
  $message->thread_id = $r['thread_id'];
  $message->sender_id = $r['sender_id'];
  $message->subject   = $r['subject'];
  $message->message   = $r['content'];
  $message->date_sent = $r['date_sent'];

  // If we have a thread ID...
  if ( ! empty( $r['thread_id'] ) ) {

    // ...use the existing recipients
    $thread              = new BP_Messages_Thread( $r['thread_id'] );
    $message->recipients = $thread->get_recipients();

    // Strip the sender from the recipient list, and unset them if they are
    // not alone. If they are alone, let them talk to themselves.
    if ( isset( $message->recipients[ $r['sender_id'] ] ) && ( count( $message->recipients ) > 1 ) ) {
      unset( $message->recipients[ $r['sender_id'] ] );
    }

    // Set a default reply subject if none was sent.
    if ( empty( $message->subject ) ) {
      $message->subject = sprintf( __( 'Re: %s', 'buddypress' ), $thread->messages[0]->subject );
    }

  // ...otherwise use the recipients passed
  } else {

    // Bail if no recipients.
    if ( empty( $r['recipients'] ) ) {
      if ( 'wp_error' === $r['error_type'] ) {
        return new WP_Error( 'message_empty_recipients', __( 'Message could not be sent. Please enter a recipient.', 'buddypress' ) );
      } else {
        return false;
      }
    }

    // Set a default subject if none exists.
    if ( empty( $message->subject ) ) {
      $message->subject = __( 'No Subject', 'buddypress' );
    }

    // Setup the recipients array.
    $recipient_ids = array();

    // Invalid recipients are added to an array, for future enhancements.
    $invalid_recipients = array();

    // Loop the recipients and convert all usernames to user_ids where needed.
    foreach ( (array) $r['recipients'] as $recipient ) {

      // Trim spaces and skip if empty.
      $recipient = trim( $recipient );
      if ( empty( $recipient ) ) {
        continue;
      }

      // Check user_login / nicename columns first
      // @see http://buddypress.trac.wordpress.org/ticket/5151.
      if ( bp_is_username_compatibility_mode() ) {
        $recipient_id = bp_core_get_userid( urldecode( $recipient ) );
      } else {
        $recipient_id = bp_core_get_userid_from_nicename( $recipient );
      }

      // Check against user ID column if no match and if passed recipient is numeric.
      if ( empty( $recipient_id ) && is_numeric( $recipient ) ) {
        if ( bp_core_get_core_userdata( (int) $recipient ) ) {
            $recipient_id = (int) $recipient;
        }
      }

      // Decide which group to add this recipient to.
      if ( empty( $recipient_id ) ) {
        $invalid_recipients[] = $recipient;
      } else {
        $recipient_ids[] = (int) $recipient_id;
      }
    }

    // Strip the sender from the recipient list, and unset them if they are
    // not alone. If they are alone, let them talk to themselves.
    $self_send = array_search( $r['sender_id'], $recipient_ids );
    if ( ! empty( $self_send ) && ( count( $recipient_ids ) > 1 ) ) {
      unset( $recipient_ids[ $self_send ] );
    }

    // Remove duplicates & bail if no recipients.
    $recipient_ids = array_unique( $recipient_ids );
    if ( empty( $recipient_ids ) ) {
      if ( 'wp_error' === $r['error_type'] ) {
        return new WP_Error( 'message_invalid_recipients', __( 'Message could not be sent because you have entered an invalid username. Please try again.', 'buddypress' ) );
      } else {
        return false;
      }
    }

    // Format this to match existing recipients.
    foreach ( (array) $recipient_ids as $i => $recipient_id ) {
      $message->recipients[ $i ]          = new stdClass;
      $message->recipients[ $i ]->user_id = $recipient_id;
    }
  }

  // Bail if message failed to send.
  $send = $message->send();
  if ( false === is_int( $send ) ) {
    if ( 'wp_error' === $r['error_type'] ) {
      if ( is_wp_error( $send ) ) {
        return $send;
      } else {
        return new WP_Error( 'message_generic_error', __( 'Message was not sent. Please try again.', 'buddypress' ) );
      }
    }

    return false;
  }


/**
 * Fires after a message has been successfully sent.
 *
 * @since 1.1.0
 *
 * @param BP_Messages_Message $message Message object. Passed by reference.
 */
  do_action_ref_array( 'messages_message_sent', array( &$message ) );

  // Return the thread ID.
  return $message->thread_id;
}

在此功能的最后messages_new_message1 ，有一行显示return $message->thread_id;。

我想获取thread_id变量并将其放入此函数中：

messages_delete_thread(thread_id,bp_loggedin_user_id());

我试图提取变量thread_id，但它似乎返回空。我想在messages_delete_thread结束时发起messages_new_message1。如何将此变量放入下一个函数中，同时仍然在前一个函数中？

我尝试这样结束messages_new_message1：

// Return the thread ID.
// return $message->thread_id;  <- commented out as I don't want to end here
messages_delete_thread($thread_id,bp_loggedin_user_id());
}

但它没有用，所以我猜它是因为我错误地引用了thread_id和/或没有正确启动下一个函数。我想在messages_new_message1中使用这个函数，因为我需要循环send_msg（）。