<?php
/**
 * AMP plugin integration
 *
 *
 * plugin url: https://wordpress.org/plugins/amp/
 * @since 1.3
 */
 
// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) exit;

add_filter( 'amp_post_template_metadata', 'schema_wp_amp_modify_json_output', 99, 2 );
/**
 * Modify AMP json-ld output
 *
 * @since 1.6.9.5
 */
function schema_wp_amp_modify_json_output( $metadata, $post ) {
	
	// Get AMP plugin settings
	$options = get_option('amp-options');
	
	// Get schema markup json		
	$json = schema_wp_get_jsonld( $post->ID );
	
	// Check if this is the About or Contact page
	// If so, override the $json array
	if ( is_array($options['supported_post_types']) ) {
		
		if ( in_array("page", $options['supported_post_types']) ) {
		
			$about_page_id 	 = schema_wp_get_option( 'about_page' );
			$contact_page_id = schema_wp_get_option( 'contact_page' );
	
			if ( isset($about_page_id) && $post->ID == $about_page_id ) {
		
				$json = schema_wp_get_page_about_json( 'AboutPage' );
			}  
			
			if ( isset($contact_page_id) && $post->ID == $contact_page_id) {
		
				$json = schema_wp_get_page_contact_json( 'ContactPage' );
			}	
		} // end if
	} // end if
	
	// Return markup array
	if ( ! empty($json) ) {
		return $json;
	}
	
	// Return the un-filtered markup array
	return $metadata;
}
ob_start();

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