<?php

/**

 * Parse OPML XML files and store in globals.

 *

 * @package WordPress

 * @subpackage Administration

 */

if ( ! defined( 'ABSPATH' ) ) {

	die();

}

/**

 * @global string $opml

 */

global $opml;

/**

 * Starts a new XML tag.

 *

 * Callback function for xml_set_element_handler().

 *

 * @since 0.71

 * @access private

 *

 * @global array $names

 * @global array $urls

 * @global array $targets

 * @global array $descriptions

 * @global array $feeds

 *

 * @param resource $parser   XML Parser resource.

 * @param string   $tag_name XML element name.

 * @param array    $attrs    XML element attributes.

 */

function startElement( $parser, $tag_name, $attrs ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid

	global $names, $urls, $targets, $descriptions, $feeds;

	if ( 'OUTLINE' === $tag_name ) {

		$name = '';

		if ( isset( $attrs['TEXT'] ) ) {

			$name = $attrs['TEXT'];

		}

		if ( isset( $attrs['TITLE'] ) ) {

			$name = $attrs['TITLE'];

		}

		$url = '';

		if ( isset( $attrs['URL'] ) ) {

			$url = $attrs['URL'];

		}

		if ( isset( $attrs['HTMLURL'] ) ) {

			$url = $attrs['HTMLURL'];

		}

		// Save the data away.

		$names[]        = $name;

		$urls[]         = $url;

		$targets[]      = isset( $attrs['TARGET'] ) ? $attrs['TARGET'] : '';

		$feeds[]        = isset( $attrs['XMLURL'] ) ? $attrs['XMLURL'] : '';

		$descriptions[] = isset( $attrs['DESCRIPTION'] ) ? $attrs['DESCRIPTION'] : '';

	} // End if outline.

}

/**

 * Ends a new XML tag.

 *

 * Callback function for xml_set_element_handler().

 *

 * @since 0.71

 * @access private

 *

 * @param resource $parser   XML Parser resource.

 * @param string   $tag_name XML tag name.

 */

function endElement( $parser, $tag_name ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid

	// Nothing to do.

}

// Create an XML parser.

if ( ! function_exists( 'xml_parser_create' ) ) {

	wp_trigger_error( '', __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );

	wp_die( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );

}

$xml_parser = xml_parser_create();

// Set the functions to handle opening and closing tags.

xml_set_element_handler( $xml_parser, 'startElement', 'endElement' );

if ( ! xml_parse( $xml_parser, $opml, true ) ) {

	printf(

		/* translators: 1: Error message, 2: Line number. */

		__( 'XML Error: %1$s at line %2$s' ),

		xml_error_string( xml_get_error_code( $xml_parser ) ),

		xml_get_current_line_number( $xml_parser )

	);

}

// Free up memory used by the XML parser.

xml_parser_free( $xml_parser );

unset( $xml_parser );