The error knocks out Yandex.Market why, did it work before ??

Question

PHP

Help me find the jamb, it's strange somehow. Version tried 5.6 php and 7.1..

This page contains the following errors:
error on line 1 at column 6: XML declaration allowed only at the start of the document
Below is a rendering of the page up to the first error.

Gives an error Market:

*Возникшие ошибки: Error parsing XML feed: Start tag expected, '<' not found ( ).

The product output code itself:

<?php
require_once('api/Okay.php');
$okay = new Okay();
header("Content-type: text/xml; charset=UTF-8");
print (pack('CCC', 0xef, 0xbb, 0xbf));
// Заголовок
print
"<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE yml_catalog SYSTEM 'shops.dtd'>
<yml_catalog date='".date('Y-m-d H:i')."'>
<shop>
<name>".$okay->settings->site_name."</name>
<company>".$okay->settings->company_name."</company>
<url>".$okay->config->root_url."</url>
<platform>OkayCMS</platform>
<version>".$okay->config->version."</version>
";
// Валюты
$currencies = $okay->money->get_currencies(array('enabled'=>1));
$main_currency = reset($currencies);
print "<currencies>
";
foreach($currencies as $c)
if($c->enabled)
print "<currency id='".$c->code."' rate='".$c->rate_to/$c->rate_from*$main_currency->rate_from/$main_currency->rate_to."'/>
";
print "</currencies>
";


// Категории
$categories = $okay->categories->get_categories();
print "<categories>
";
foreach($categories as $c)
{
print "<category id='$c->id'";
if($c->parent_id>0)
  print " parentId='$c->parent_id'";
print ">".htmlspecialchars($c->name)."</category>
";
}
print "</categories>
";

$features = array();
$stock_filter = $okay->settings->yandex_export_not_in_stock ? '' : ' AND (v.stock >0 OR v.stock is NULL) ';

// Товары
$okay->db->query("SET SQL_BIG_SELECTS=1");
// Товары
$okay->db->query("SELECT 
        p.body, 
        b.name as vendor, 
        v.stock, 
        v.compare_price, 
        v.sku, 
        v.price, 
        v.id as variant_id, 
        p.name as product_name, 
        v.name as variant_name, 
        v.position as variant_position, 
        p.id as product_id, 
        p.url, 
        p.annotation, 
        pc.category_id, 
        c.rate_from, 
        c.rate_to, 
        v.currency_id 
    FROM __variants v 
    LEFT JOIN __products p ON v.product_id=p.id
    left join __currencies as c on(c.id=v.currency_id)
    LEFT JOIN __products_categories pc ON p.id = pc.product_id AND pc.position=(SELECT MIN(position) FROM __products_categories WHERE product_id=p.id LIMIT 1)
    LEFT JOIN __brands b on (b.id = p.brand_id)
    WHERE 
        1 
        AND p.visible 
        AND v.yandex = 1 
        $stock_filter 
    GROUP BY v.id 
    ORDER BY p.id, v.position ");
print "<offers>
";


$currency_code = reset($currencies)->code;
$prev_product_id = null;

$products = $okay->db->results();
$p_ids = array();
foreach ($products as $p) {
    if (!in_array($p->product_id, $p_ids)) {
        $p_ids[] = $p->product_id;
    }
}
$p_images = array();

foreach($okay->products->get_images(array('product_id' => $p_ids)) as $image) {
    $p_images[$image->product_id][] = $image->filename;
};

foreach($products as $p) {
    $variant_url = '';
    if ($prev_product_id === $p->product_id) {
        $variant_url = '?variant='.$p->variant_id;
    }
    $prev_product_id = $p->product_id;
    
    //если задана валюта варианта - переводим к основной
    if ($p->currency_id > 0) {
        if ($p->rate_from != $p->rate_to) {
            $p->price = $p->price*$p->rate_to/$p->rate_from;
            $p->compare_price = $p->compare_price*$p->rate_to/$p->rate_from;
        }
        $price = round($p->price, 2);
        $old_price = round($p->compare_price, 2);
    } else {
        $price = round($okay->money->convert($p->price, $main_currency->id, false),2);
        $old_price = round($okay->money->convert($p->compare_price, $main_currency->id, false),2);
    }
    $old_price = ($old_price > 0 ? "<oldprice>$old_price</oldprice>" : '');
    print
    "
    <offer id='$p->variant_id' type='vendor.model' available='".($p->stock > 0 || $p->stock === null ? 'true' : 'false')."'>
    <url>".$okay->config->root_url.'/products/'.$p->url.$variant_url."</url>";
    print "
    <price>$price</price>
    $old_price
    <currencyId>".$currency_code."</currencyId>
    <categoryId>".$p->category_id."</categoryId>
    <market_category>".$categories[$p->category_id]->yandex_name."</market_category>
    ";
    
    if(!empty($p_images[$p->product_id])) {
        foreach($p_images[$p->product_id] as $img) {
            print "<picture>".$okay->design->resize_modifier($img, 800, 600)."</picture>";
        }
    }
    
    print "
    <store>".($okay->settings->yandex_available_for_retail_store ? 'true' : 'false')."</store>
    <pickup>".($okay->settings->yandex_available_for_reservation ? 'true' : 'false')."</pickup>
    <delivery>true</delivery>
    <vendor>$p->vendor</vendor>
    ".($p->sku ? '<vendorCode>'.$p->sku.'</vendorCode>' : '')."
    ";
    
    print "<model>".htmlspecialchars($p->product_name).($p->variant_name?' '.htmlspecialchars($p->variant_name):'')."</model>
    <description>".htmlspecialchars(strip_tags(($okay->settings->yandex_short_description ? $p->body : $p->annotation)))."</description>
    ".($okay->settings->yandex_sales_notes ? "<sales_notes>".htmlspecialchars(strip_tags($okay->settings->yandex_sales_notes))."</sales_notes>" : "")."
    ";
    
    print "
    <manufacturer_warranty>".($okay->settings->yandex_has_manufacturer_warranty ? 'true' : 'false')."</manufacturer_warranty>
    <seller_warranty>".($okay->settings->yandex_has_seller_warranty ? 'true' : 'false')."</seller_warranty>
    ";
    
    if (!in_array($p->product_id, array_keys($features))) {
        $features[$p->product_id] = $okay->features->get_product_options(array('product_id'=>$p->product_id));
    }
    if (!empty($features[$p->product_id])) {
        foreach($features[$p->product_id] as $feature) {
            print "
            <param name='".htmlspecialchars($feature->name)."'>".htmlspecialchars($feature->value)."</param>
            ";
        }
    }
    print "</offer>";
}

print "</offers>
";
print "</shop>
</yml_catalog>
";

Answer 1

Try removing this line:
print (pack('CCC', 0xef, 0xbb, 0xbf));