How to load different Bloginfo value for top level pages? - wordpress

Question

I am no PHP programmer therefore I have been scratching my head for two hours on this issue as there seems to be many ways of doing it. None of which I managed to get working because of my poor PHP/Wordpress syntax and logic knowledge.
What is the best way to create and call a function that loads a different value for <?php bloginfo('name') ?> only on top level pages? i.e. top level menu headings.
I was wondering if there would be the possibility of doing something along these lines:
<?php
if ( is_page( 'about' ) || == $post->post_parent ) {
bloginfo = 'about';
} elseif ( is_page( 'work' ) || == $post->post_parent ) {
bloginfo = 'work';
} elseif ( is_page( 'contact' ) || == $post->post_parent ) {
bloginfo = 'contact';
} else {
bloginfo('name');
}
?>
Please treat it as pseudo code as I am still familiarizing myself with the wordpress and PHP codex/syntax, hence why I cannot get anything to work. But basically, what I need to do is use the main nav link names as the bloginfo name for every page in their section. Anything else is an exception which defaults back to the home bloginfo name.
Would it be easier to try to parse the nav link titles themselves into the function?
Please help if you can!
UPDATE
I have completely ditched the previous option and went the following route:
<?php if (is_page() || is_single( array( 62, 57, 51, 8 ) )) {
echo wp_title('');
}
else{
$category = get_the_category();
echo $category[0]->cat_name;
}?>
It is kind of botched but after reading lots of reference material on the wordpress site, I think I am beginning to understand the syntax. So, instead of targeting bloginfo() I am now targeting the page title. However I do not want the posts to have a huge title therefore I am making all pages other than top level "pages" pick up the first category instead, except for a handful of posts which are in fact custom pages, so need to display the wp_title value.
If anyone has any tips on turning this into a more flexible/efficient function please drop a post otherwise I will make this as resolved in a couple of hours.

Answer 1

the syntax would be
<?php
if ( is_page( 'about' ) || == $post->post_parent ) {
bloginfo('about');
} elseif ( is_page( 'work' ) || == $post->post_parent ) {
bloginfo('work');
} elseif ( is_page( 'contact' ) || == $post->post_parent ) {
bloginfo('contact');
} else {
bloginfo('name');
}
?>
but there are no such parameters like about,work,contact to the bloginfo function in wordpress.
For more information on bloginfo, please check the this url -> http://codex.wordpress.org/Function_Reference/bloginfo

Answer 2

You may try this to filter/change the name using bloginfo filter (just add this code snippet in your functions.php file)
function my_custom_blogname( $output, $show )
{
if( $show == 'name' )
{
if( is_page('about') ) $output = 'It\'s my about page';
if( is_page('work') ) $output = 'It\'s my work page';
if( is_page('contact') ) $output = 'It\'s my contact page';
}
return $output;
}
add_filter('bloginfo', 'my_custom_blogname', 10, 2);
Update : Also you can check if the page is parent/top lavel page using
if( !$post->post_parent ) // To check only if it's a parent/top lavel page
if( is_page('about') && !$post->post_parent ) $output = 'about'; // To check if it's a parent/top lavel page and about page