Adding dynamic title to Wordpress - php

Question

I am trying to create a dynamic <title> with Wordpress, so far I have this:
<title><?php bloginfo('name'); ?> <?php if(wp_title('', false)) { echo '|'; } else { echo '| Dublin, Ireland';} ?> <?php wp_title(''); ?></title>
Then when I try to add the tagline, instead of hardcoding the location, it throws an error:
<title><?php bloginfo('name'); ?> <?php if(wp_title('', false)) { echo '|'; } else { echo <?php bloginfo('description'); ?>;} ?> <?php wp_title(''); ?></title>
What other ways can this be written?

Answer 1

You have some unnecessary openint and closing php tag.
Use this:
<title><?php bloginfo('name'); if(wp_title('', false)) { echo '|'; } else { echo bloginfo('description'); } wp_title(''); ?></title>
NOTE: I really don't like thats style of coding how the Wordpress guys do. A lot of unnecessary opening and closing tag in every line of their code.
I much more like this style:
<title><?php
bloginfo('name');
if (wp_title('', false)) {
echo '|';
} else {
echo bloginfo('description');
} wp_title('');
?></title>

Answer 2

Using the_title and add_filter
add_filter('the_title','some_callback');
function some_callback($data){
global $post;
// where $data would be string(#) "current title"
// Example:
// (you would want to change $post->ID to however you are getting the book order #,
// but you can see how it works this way with global $post;)
return 'Book Order #' . $post->ID;
}
try this.