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<?php
/**
* Sitemaps (per the protocol) are essentially lists of XML fragments;
* lists which are subject to size constraints. The Jetpack_Sitemap_Buffer_Image
* extends the Jetpack_Sitemap_Buffer class to represent the single image sitemap
* buffer.
*
* @since 5.3.0
* @package Jetpack
*/
/**
* A buffer for constructing sitemap image xml files for users that have no libxml support.
*
* @since 5.3.0
*/
class Jetpack_Sitemap_Buffer_Image extends Jetpack_Sitemap_Buffer_Fallback {
protected function get_root_element() {
if ( ! isset( $this->root ) ) {
/**
* Filter the XML namespaces included in image sitemaps.
*
* @module sitemaps
*
* @since 4.8.0
*
* @param array $namespaces Associative array with namespaces and namespace URIs.
*/
$namespaces = apply_filters(
'jetpack_sitemap_image_ns',
array(
'xmlns:xsi' => 'http://www.w3.org/2001/XMLSchema-instance',
'xsi:schemaLocation' => 'http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd',
'xmlns' => 'http://www.sitemaps.org/schemas/sitemap/0.9',
'xmlns:image' => 'http://www.google.com/schemas/sitemap-image/1.1',
)
);
$sitemap_xsl_url = $this->finder->construct_sitemap_url( 'sitemap.xsl' );
$jetpack_version = JETPACK__VERSION;
$this->root = array(
"<!-- generator='jetpack-{$jetpack_version}' -->" . PHP_EOL
. "<?xml-stylesheet type='text/xsl' href='{$sitemap_xsl_url}'?>" . PHP_EOL
. '<urlset ' . $this->array_to_xml_attr_string( $namespaces ) . '>' . PHP_EOL,
'</urlset>',
);
$this->byte_capacity -= strlen( join( '', $this->root ) );
}
return $this->root;
}
}
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