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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   * 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   */
  36  function 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   */
  75  function endElement( $parser, $tag_name ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
  76      // Nothing to do.
  77  }
  78  
  79  // Create an XML parser.
  80  if ( ! 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.
  88  xml_set_element_handler( $xml_parser, 'startElement', 'endElement' );
  89  
  90  if ( ! 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  
  99  // Free up memory used by the XML parser.
 100  xml_parser_free( $xml_parser );
 101  unset( $xml_parser );