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I want to filter the blog's name for Google's user agents.

I have tried the_title, the_content, comment_text, single_post_title, wp_title, category_description, bloginfo hooks, but none of them worked!

Can anybody help me?

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3 Answers

The value is from get_option('blogname'), so you can filter pre_option_blogname:

add_filter( 'pre_option_blogname', 'wpse_78345_blogname' );

function wpse_78345_blogname()
{
    return 'Haha!';
}

Do not filter option_blogname. This is wrong: you are wasting time with that, because WordPress will parse the option cache for the stored result, and then you don’t even use it.

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as I know pre if for detabase writes. I just want to edit blogname for google user agents! –  ahmadali shafiee Jan 5 '13 at 17:14
    
I forgot to say that I want to filter it for google's user agents! –  ahmadali shafiee Jan 5 '13 at 17:16
    
@ahmadalishafiee Then go and edit your question with this info, please (also the title). –  kaiser Jan 5 '13 at 17:18
    
I don't think the title need to be changed. But I edited the question –  ahmadali shafiee Jan 5 '13 at 17:20
    
@ahmadalishafiee No, pre_option_ happens very early in get_option. How to handle cloaking based on User-Agent headers is off topic here. –  toscho Jan 5 '13 at 17:21
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You said that you have tried using the bloginfo filter, but this code works fine:

function wpse_78345_alter_blog_name( $output, $show ) {
    if ( $show != 'name' ) return $output;
    return 'New blog title';
}

add_filter( 'bloginfo', 'wpse_78345_alter_blog_name', 10, 2 );

This filter will only fire on the front-end, not the dashboard.

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There were an answer 5 mins ago! and that worked! I used add_filter('option_blogname','HalfSpace_filter',1,1); and that worked!

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