put the content of a single post into og:description

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I’d like to have the content of the current single post loaded into the og:description meta property – but the '. $content .' doesn’t output anything?

This is what’s in my header.php

if (is_single()) {

$content = get_the_content();
$desc="<meta property="og:description" content="". $content .'" />';
echo $desc;
}

What could the problem be?

2 Answers
2

get_the_content() must be inside the loop, in header.php you can do this (don’t forget to scape the content to use it as attribute):

 if (is_single()) {
    while (have_posts()) {
        the_post();
        $content = get_the_content();
        $desc="<meta property="og:description" content="". esc_attr($content) .'">';
        echo $desc;
    }
 }

or even better, in your functions.php hook the wp_head action; also, I recomend using the excerpt instead of the content as descriptoin. (note the use of global $post and setup_postdata).

 add_action( 'wp_head', 'my_wp_head' );
 function my_wp_head() {
     if (is_single()) {
         $post_id = get_queried_object_id():
         $excerpt = get_the_excerpt( $post_id );
         $desc="<meta property="og:description" content="Blabla". esc_attr( $excerpt ) .'">';
         echo $desc;
      }
      //More stuff to put in <head>
  }

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