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The problem:

I would like to be able to manage custom <meta> elements, on a per-item basis in a custom theme. An example would be for adding open graph and schema tags, but I'm really looking for a generic solution.

I'm aware of custom modules, such as Meta Tags, but I'd rather avoid relying on other modules at this point.

What I've Tried:

After looking at them_field it looked as though I should create a custom theme function for my custom field (field_test being used for this example). The theme function could add a <meta> tag and not return any content to be rendered.

In template.php: 
<?php
//I *did* actually use my theme name instead of THEMENAME
function THEMENAME_field__field_test($vars) {
    drupal_add_html_head(array(
        '#tag' => 'meta',
        '#attributes' => array(
            'content' => drupal_render($vars['items'][0]),
            'name' => 'test'
        )
    ), 'test');

    //I figured this would prevent the field from being rendered inline
    return '';
}

Using that code the custom <meta> element was correctly added to the <head>. Nevertheless, the field was still rendered on the page.

If I changed the output to:

return ' ';

The content was no longer rendered to the page, but an unnecessary space character would be output where the field was to be rendered.

Is there a better way to render a field as a <meta> element?
-or-
How can I prevent this themed field from rendering inline?

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1 Answer 1

Reset to default
-1

try to return drupal_add_html_head array directly

<?php

function THEMENAME_field__field_test($vars) {
    return drupal_add_html_head(array(
        '#tag' => 'meta',
        '#attributes' => array(
            'content' => drupal_render($vars['items'][0]),
            'name' => 'test'
        )
    ), 'test');
 }
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3
  • This produced Array in the output.
    – zzzzBov
    Commented Nov 7, 2012 at 15:52
  • then use return drupal_render( your array)
    – Ravindra Singh
    Commented Nov 8, 2012 at 7:17
  • I'm not sure I follow, could you update your answer with details?
    – zzzzBov
    Commented Nov 8, 2012 at 14:09

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