xnau/pdb-opengraph-headers.php

## pdb-opengraph-headers.php
<?php
/**
 * Plugin Name: PDB Add Facebook/Twitter Meta Tags
 * Description: place metadata tags in the header of a single record page
 */
// this will fire just before the end of the page <head> tag
add_action( 'wp_head', 'xnau_place_opengraph_tags', 100 );

/**
 * places the meta tags in the page head
 *
 */
function xnau_place_opengraph_tags ()
{
  $post = get_post();
  /*
   * this gets the single record page ID from the plugin settings; make sure the
   * plugin settings are set to point to the page with your [pdb_single] shortcode
   */
  if ( $post->ID == xnau_pdb_single_record_page() ) {

    // this prints the meta tags
    echo do_shortcode( '[pdb_single template=opengraph]' );
  }
}

/**
 * provides the ID of the single record page from the plugin settings
 *
 * @return string ID
 */
function xnau_pdb_single_record_page()
{
  return Participants_Db::apply_filters( 'single_record_page', Participants_Db::$plugin_options['single_record_page'] );
}
	<?php
	/**
	* Plugin Name: PDB Add Facebook/Twitter Meta Tags
	* Description: place metadata tags in the header of a single record page
	*/
	// this will fire just before the end of the page <head> tag
	add_action( 'wp_head', 'xnau_place_opengraph_tags', 100 );

	/**
	* places the meta tags in the page head
	*
	*/
	function xnau_place_opengraph_tags ()
	{
	$post = get_post();
	/*
	* this gets the single record page ID from the plugin settings; make sure the
	* plugin settings are set to point to the page with your [pdb_single] shortcode
	*/
	if ( $post->ID == xnau_pdb_single_record_page() ) {

	// this prints the meta tags
	echo do_shortcode( '[pdb_single template=opengraph]' );
	}
	}

	/**
	* provides the ID of the single record page from the plugin settings
	*
	* @return string ID
	*/
	function xnau_pdb_single_record_page()
	{
	return Participants_Db::apply_filters( 'single_record_page', Participants_Db::$plugin_options['single_record_page'] );
	}