1<?php
  2/**
  3 * Parse OPML XML files and store in globals.
  4 *
  5 * @package WordPress
  6 * @subpackage Administration
  7 */
  8
  9if ( ! defined( 'ABSPATH' ) ) {
 10	die();
 11}
 12
 13/**
 14 * @global string $opml
 15 */
 16global $opml;
 17
 18/**
 19 * Starts a new XML tag.
 20 *
 21 * Callback function for xml_set_element_handler().
 22 *
 23 * @since 0.71
 24 * @access private
 25 *
 26 * @global array $names
 27 * @global array $urls
 28 * @global array $targets
 29 * @global array $descriptions
 30 * @global array $feeds
 31 *
 32 * @param resource $parser   XML Parser resource.
 33 * @param string   $tag_name XML element name.
 34 * @param array    $attrs    XML element attributes.
 35 */
 36function startElement( $parser, $tag_name, $attrs ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
 37	global $names, $urls, $targets, $descriptions, $feeds;
 38
 39	if ( 'OUTLINE' === $tag_name ) {
 40		$name = '';
 41		if ( isset( $attrs['TEXT'] ) ) {
 42			$name = $attrs['TEXT'];
 43		}
 44		if ( isset( $attrs['TITLE'] ) ) {
 45			$name = $attrs['TITLE'];
 46		}
 47		$url = '';
 48		if ( isset( $attrs['URL'] ) ) {
 49			$url = $attrs['URL'];
 50		}
 51		if ( isset( $attrs['HTMLURL'] ) ) {
 52			$url = $attrs['HTMLURL'];
 53		}
 54
 55		// Save the data away.
 56		$names[]        = $name;
 57		$urls[]         = $url;
 58		$targets[]      = isset( $attrs['TARGET'] ) ? $attrs['TARGET'] : '';
 59		$feeds[]        = isset( $attrs['XMLURL'] ) ? $attrs['XMLURL'] : '';
 60		$descriptions[] = isset( $attrs['DESCRIPTION'] ) ? $attrs['DESCRIPTION'] : '';
 61	} // End if outline.
 62}
 63
 64/**
 65 * Ends a new XML tag.
 66 *
 67 * Callback function for xml_set_element_handler().
 68 *
 69 * @since 0.71
 70 * @access private
 71 *
 72 * @param resource $parser   XML Parser resource.
 73 * @param string   $tag_name XML tag name.
 74 */
 75function endElement( $parser, $tag_name ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
 76	// Nothing to do.
 77}
 78
 79// Create an XML parser.
 80if ( ! function_exists( 'xml_parser_create' ) ) {
 81	wp_trigger_error( '', __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
 82	wp_die( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
 83}
 84
 85$xml_parser = xml_parser_create();
 86
 87// Set the functions to handle opening and closing tags.
 88xml_set_element_handler( $xml_parser, 'startElement', 'endElement' );
 89
 90if ( ! xml_parse( $xml_parser, $opml, true ) ) {
 91	printf(
 92		/* translators: 1: Error message, 2: Line number. */
 93		__( 'XML Error: %1$s at line %2$s' ),
 94		xml_error_string( xml_get_error_code( $xml_parser ) ),
 95		xml_get_current_line_number( $xml_parser )
 96	);
 97}
 98
 99if ( PHP_VERSION_ID < 80000 ) { // xml_parser_free() has no effect as of PHP 8.0.
100	// Free up memory used by the XML parser.
101	xml_parser_free( $xml_parser );
102}
103
104unset( $xml_parser );
105