Edit title-tag in wp_head with yoast seo

Question

I want to manipulate the html-title tag, so <title> these not the content of the title-tag!

I use child-themes and it's inevitable, because the template have to be easy to update. So I have to use the functions.php or the header.php in the child-folder.

At moment I try it with the functions.php

At moment I have following situation:

<!-- Start WP_HEAD
================================================== -->

<!-- This site is optimized with the Yoast WordPress SEO plugin v1.5.3.3 - https://yoast.com/wordpress/plugins/seo/ -->
<title>My awesome title-content</title>
<meta name="robots" content="noindex,follow,noodp,noydir"/>
<link rel="canonical" href="WEBSITE" />
<meta property="og:locale" content="de_DE" />

and I want to have these situation:

The focus are on the title-tag

<!-- Start WP_HEAD
================================================== -->

<!-- This site is optimized with the Yoast WordPress SEO plugin v1.5.3.3 - https://yoast.com/wordpress/plugins/seo/ -->
<title itemprop="name" id="company_name">My awesome title-content</title>
<meta name="robots" content="noindex,follow,noodp,noydir"/>
<link rel="canonical" href="WEBSITE" />
<meta property="og:locale" content="de_DE" />

my current try in the functions.php in the child-folder are:

add_action('get_header', 'blog_template_add_ob_start');
add_action('wp_head', 'blog_template_add_ob_end_flush', 100);
function blog_template_add_ob_start() {
    ob_start('blog_template_add_filter_wp_head_output');
}
function blog_template_add_ob_end_flush() {
    ob_end_flush();
}
function blog_template_add_filter_wp_head_output($output) {

    if (is_single()) {
        $output = preg_replace('/<title>(.*?) - (.*?)<\/title>/', '<title><span itemprop="name" id="company_name">$2</span> &raquo; $1</title>', $output);
        #$output = str_ireplace('<meta property="og:url" content="' . $url . '" />', '<meta     property="og:url" content="' . esc_attr(esc_url($altUrl)) . '" />', $output);
    }
    return $output;
}

my first try was these: first:

function add_itempromp_to_title( $str )
{
    #$str = preg_replace('/<title>(.*?) - (.*?)<\/title>/', '<title><span itemprop="name" id="company_name">$2</span> &raquo; $1</title>', $str);
    return $str;
}   
add_filter( 'wp_head', 'add_itempromp_to_title', 99 );

I had try these: Manipulating wp_head content but isn't work anymore.

Does anyone have an idea?

The Yoast-Plugin-Version are 1.5.3.3

The WP-Version are 3.8.3

Answer 1

I don't think adding <span itemprop> to the <title> is a good idea... If you can not use any existing tags like <h1> for that, you may consider adding meta tag: <meta itemprop="name" content="Company Name">. You can add this using wp_head, but keep in mind it should be within itemscope.

If you really going after changing title tag, Yoast SEO has it's own filter 'wpseo_title', so you need to call that one.

add_filter('wpseo_title', 'filter_title'); function filter_title($title) { // do something to the $title here return $title; }

Answer 2

I still don't know why you're trying to pass the item property through the head tag. I have a gut feeling you're trying to tell Google abut a particular item. For example:

• itemprop is brown_shoes
• itemprop is red_hat

In each of these cases, you want Google to know that you sell brown shoes or a red hat.

This would be better suited if you created a wp_products table in your database, and in that table, put the following:

1. product_id - This will be the Primary Key
2. product_desc - Description
3. product_image - URL to image
4. product_price - Price
5. product_keywords - These will be keywords that you can pass to the meta tag

Create a ProductPage Template, using a Custom WP_Query and this Plugin, URL Params, to pass the product_id field to every page. In the HEAD SECTION of the template add:

<meta name="keywords" content="<? php echo $product_keywords; ?>"

Since PHP completes the WP_Query before rendering the page, this is perfectly acceptable.