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<?php
namespace WP_Rocket\Engine\Preload\Frontend;
use SimpleXMLElement;
class SitemapParser {
/**
* XML document to parse.
*
* @var SimpleXMLElement|false
*/
protected $xml;
/**
* Set the content from the sitemap to parse.
*
* @param string $content content from the sitemap to parse.
*/
public function set_content( string $content ) {
libxml_use_internal_errors( true );
$this->xml = simplexml_load_string( $content );
}
/**
* Get links to sitemaps.
*
* @return array
*/
public function get_links(): array {
$links = [];
if ( false === $this->xml ) {
return [];
}
$url_count = count( $this->xml->url );
for ( $i = 0; $i < $url_count; $i++ ) {
$url = (string) $this->xml->url[ $i ]->loc;
if ( ! $url ) {
continue;
}
$links [] = $url;
}
return $links;
}
/**
* Get children sitemaps.
*
* @return array
*/
public function get_children(): array {
$children = [];
if ( false === $this->xml ) {
return [];
}
$sitemap_children = count( $this->xml->sitemap );
for ( $i = 0; $i < $sitemap_children; $i++ ) {
$url = (string) $this->xml->sitemap[ $i ]->loc;
if ( ! $url ) {
continue;
}
$children [] = $url;
}
return $children;
}
}
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