在回复中仅向邮件主题添加一个“Re：”

Question

I use a Private Message script where it adds a Re: to the message subject upon every reply. Unfortunately, if there are more than one reply to the same message, it adds another Re:, so by the time a few PMs have been exchanged, it looks like this:

Re: Re: Re: Re: Re: Re: Re: Re: Hello World!

Here are the relevant parts of the script that does this:

                    | <a class="reply"
                    href="<?php echo wp_nonce_url( "?page=rwpm_send&recipient=$msg->sender&id=$msg->id&subject=Re: " . stripcslashes( $msg->subject ), 'rwpm-reply_inbox_msg_' . $msg->id ); ?>"><?php _e( 'Reply', 'pm4wp' ); ?></a>

So I want to adjust the script so that it only adds one Re: if there is a reply. How do I do that? I am guessing maybe an IF statement checking if there is already a Re: there or not...

Answer 1

So, add the "Re: " only if there is no:

| <a class="reply" href="<?php echo wp_nonce_url( "?page=rwpm_send&recipient=$msg->sender&id=$msg->id&subject=".(strpos($msg->subject, "Re:") === false ? "Re: " : ""). stripcslashes( $msg->subject ), 'rwpm-reply_inbox_msg_' . $msg->id ); ?>"><?php _e( 'Reply', 'pm4wp' ); ?></a>

And, when it only should stay on the beginning:

   | <a class="reply" href="<?php echo wp_nonce_url( "?page=rwpm_send&recipient=$msg->sender&id=$msg->id&subject=".(substr($msg->subject, 0, 3) != "Re:" ? "Re: " : ""). stripcslashes( $msg->subject ), 'rwpm-reply_inbox_msg_' . $msg->id ); ?>"><?php _e( 'Reply', 'pm4wp' ); ?></a>