breadcrumbs schema.org

init.php

<?

AddEventHandler("main", "OnEndBufferContent", "AddMicrodataBreadCrumbs",99999);

function AddMicrodataBreadCrumbs(&$content){
    global $APPLICATION;
    if(defined('ADMIN_SECTION')){
        return true;
    }

    $dir = $APPLICATION->GetCurDir(false);
    if(strpos($dir, '/bitrix/admin/') !== false){
        return true;
    }

    if(strpos($dir, '/bitrix/gadgets/') !== false){
        return true;
    }

    if(strpos($dir, '/bitrix/tools/') !== false){
        return true;
    }

    if(strpos($dir, '/upload/') !== false){
        return true;
    }

    if(
        !empty($_SERVER['HTTP_X_REQUESTED_WITH'])
        && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest'
    ){
        return true;
    }

    if($_SERVER['REQUEST_METHOD'] != "GET"){
        return true;
    }

    $path = $APPLICATION->GetCurPage();


    $template = SITE_TEMPLATE_PATH."/schema_breadcrumbs.php";
    $schema =  $APPLICATION->GetNavChain($path , 0 , $template, true, false);
    $content = AddScriptCustom::addHeadScript($schema, $content);

}



class AddScriptCustom
{
    //from arturgolubev.abandoned unitools class

    static function addHeadScript($script, $oldBuffer)
    {
        $search = '</head>';
        $replace = $script . PHP_EOL . $search;

        $bufferContent = $oldBuffer;


        if (substr_count($oldBuffer, $search) == 1) {

            $bufferContent = str_replace($search, $replace, $oldBuffer);
        } else {
            $bodyEnd = self::getLastPositionIgnoreCase($oldBuffer, $search);
            if ($bodyEnd !== false) {
                $bufferContent = substr_replace($oldBuffer, $replace, $bodyEnd, strlen($search));
            }
        }

        return $bufferContent;
    }
    static function addBodyScript($script, $oldBuffer)
    {
        $search = '</body>';
        $replace = $script . PHP_EOL . $search;

        $bufferContent = $oldBuffer;


        if (substr_count($oldBuffer, $search) == 1) {

            $bufferContent = str_replace($search, $replace, $oldBuffer);
        } else {
            $bodyEnd = self::getLastPositionIgnoreCase($oldBuffer, $search);
            if ($bodyEnd !== false) {
                $bufferContent = substr_replace($oldBuffer, $replace, $bodyEnd, strlen($search));
            }
        }

        return $bufferContent;
    }

    static function getLastPositionIgnoreCase($haystack, $needle, $offset = 0)
    {
        if (defined("BX_UTF")) {
            if (function_exists("mb_orig_strripos")) {
                return mb_orig_strripos($haystack, $needle, $offset);
            }
            return mb_strripos($haystack, $needle, $offset, "latin1");
        }
        return strripos($haystack, $needle, $offset);
    }

    static function getFirstPositionIgnoreCase($haystack, $needle, $offset = 0)
    {
        if (defined("BX_UTF")) {
            if (function_exists("mb_orig_stripos")) {
                return mb_orig_stripos($haystack, $needle, $offset);
            }
            return mb_stripos($haystack, $needle, $offset, "latin1");
        }
        return stripos($haystack, $needle, $offset);
    }
}

schema_breadcrumbs.php

<?php
if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();

/**
 * @global CMain $APPLICATION
 */
global $APPLICATION;

//delayed function must return a string
if(empty($arResult))
    return "";

$strReturn = '<script type="application/ld+json">';
$arData = array(
    "@context"=>"https://schema.org",
    "@type"=>"BreadcrumbList",
    "itemListElement"=>[],
);

$itemSize = count($arResult);
for($index = 0; $index < $itemSize; $index++)
{
    $title = htmlspecialcharsex($arResult[$index]["TITLE"]);
    $href = $arResult[$index]["LINK"];
    if(empty($href) && $index == $itemSize-1){
        $href = $APPLICATION->GetCurPage();
    }
    if(!empty($href)){
        $href = URN2URI($href);
    }
    $arData['itemListElement'][] = [
        "@type"=> "ListItem",
        "position"=> $index,
        "item"=>[
            "name"=>$title,
            "@id"=>$href,
        ],
    ];

}
$strReturn .= json_encode($arData);

$strReturn .= '</script>';

return $strReturn;