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   1  <?php
   2  /**
   3   * Parse OPML XML files and store in globals.
   4   *
   5   * @package WordPress
   6   * @subpackage Administration
   7   */
   8  
   9  if ( ! defined( 'ABSPATH' ) ) {
  10      die();
  11  }
  12  
  13  /**
  14   * @global string $opml
  15   */
  16  global $opml;
  17  
  18  /**
  19   * XML callback function for the start of a new XML tag.
  20   *
  21   * @since 0.71
  22   * @access private
  23   *
  24   * @global array $names
  25   * @global array $urls
  26   * @global array $targets
  27   * @global array $descriptions
  28   * @global array $feeds
  29   *
  30   * @param resource $parser   XML Parser resource.
  31   * @param string   $tag_name XML element name.
  32   * @param array    $attrs    XML element attributes.
  33   */
  34  function startElement( $parser, $tag_name, $attrs ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
  35      global $names, $urls, $targets, $descriptions, $feeds;
  36  
  37      if ( 'OUTLINE' === $tag_name ) {
  38          $name = '';
  39          if ( isset( $attrs['TEXT'] ) ) {
  40              $name = $attrs['TEXT'];
  41          }
  42          if ( isset( $attrs['TITLE'] ) ) {
  43              $name = $attrs['TITLE'];
  44          }
  45          $url = '';
  46          if ( isset( $attrs['URL'] ) ) {
  47              $url = $attrs['URL'];
  48          }
  49          if ( isset( $attrs['HTMLURL'] ) ) {
  50              $url = $attrs['HTMLURL'];
  51          }
  52  
  53          // Save the data away.
  54          $names[]        = $name;
  55          $urls[]         = $url;
  56          $targets[]      = isset( $attrs['TARGET'] ) ? $attrs['TARGET'] : '';
  57          $feeds[]        = isset( $attrs['XMLURL'] ) ? $attrs['XMLURL'] : '';
  58          $descriptions[] = isset( $attrs['DESCRIPTION'] ) ? $attrs['DESCRIPTION'] : '';
  59      } // End if outline.
  60  }
  61  
  62  /**
  63   * XML callback function that is called at the end of a XML tag.
  64   *
  65   * @since 0.71
  66   * @access private
  67   *
  68   * @param resource $parser   XML Parser resource.
  69   * @param string   $tag_name XML tag name.
  70   */
  71  function endElement( $parser, $tag_name ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
  72      // Nothing to do.
  73  }
  74  
  75  // Create an XML parser.
  76  if ( ! function_exists( 'xml_parser_create' ) ) {
  77      trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
  78      wp_die( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
  79  }
  80  
  81  $xml_parser = xml_parser_create();
  82  
  83  // Set the functions to handle opening and closing tags.
  84  xml_set_element_handler( $xml_parser, 'startElement', 'endElement' );
  85  
  86  if ( ! xml_parse( $xml_parser, $opml, true ) ) {
  87      printf(
  88          /* translators: 1: Error message, 2: Line number. */
  89          __( 'XML Error: %1$s at line %2$s' ),
  90          xml_error_string( xml_get_error_code( $xml_parser ) ),
  91          xml_get_current_line_number( $xml_parser )
  92      );
  93  }
  94  
  95  // Free up memory used by the XML parser.
  96  xml_parser_free( $xml_parser );
  97  unset( $xml_parser );