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   1  <?php
   2  /**
   3   * Feed API: WP_SimplePie_Sanitize_KSES class
   4   *
   5   * @package WordPress
   6   * @subpackage Feed
   7   * @since 4.7.0
   8   */
   9  
  10  /**
  11   * Core class used to implement SimplePie feed sanitization.
  12   *
  13   * Extends the SimplePie\Sanitize class to use KSES, because
  14   * we cannot universally count on DOMDocument being available.
  15   *
  16   * @since 3.5.0
  17   */
  18  #[AllowDynamicProperties]
  19  class WP_SimplePie_Sanitize_KSES extends SimplePie\Sanitize {
  20  
  21      /**
  22       * WordPress SimplePie sanitization using KSES.
  23       *
  24       * Sanitizes the incoming data, to ensure that it matches the type of data expected, using KSES.
  25       *
  26       * @since 3.5.0
  27       *
  28       * @param mixed   $data The data that needs to be sanitized.
  29       * @param int     $type The type of data that it's supposed to be.
  30       * @param string  $base Optional. The `xml:base` value to use when converting relative
  31       *                      URLs to absolute ones. Default empty.
  32       * @return mixed Sanitized data.
  33       */
  34  	public function sanitize( $data, $type, $base = '' ) {
  35          $data = trim( $data );
  36          if ( $type & SimplePie\SimplePie::CONSTRUCT_MAYBE_HTML ) {
  37              if ( preg_match( '/(&(#(x[0-9a-fA-F]+|[0-9]+)|[a-zA-Z0-9]+)|<\/[A-Za-z][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E]*' . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . '>)/', $data ) ) {
  38                  $type |= SimplePie\SimplePie::CONSTRUCT_HTML;
  39              } else {
  40                  $type |= SimplePie\SimplePie::CONSTRUCT_TEXT;
  41              }
  42          }
  43          if ( $type & SimplePie\SimplePie::CONSTRUCT_BASE64 ) {
  44              $data = base64_decode( $data );
  45          }
  46          if ( $type & ( SimplePie\SimplePie::CONSTRUCT_HTML | \SimplePie\SimplePie::CONSTRUCT_XHTML ) ) {
  47              $data = wp_kses_post( $data );
  48              if ( 'UTF-8' !== $this->output_encoding ) {
  49                  $data = $this->registry->call( 'Misc', 'change_encoding', array( $data, 'UTF-8', $this->output_encoding ) );
  50              }
  51              return $data;
  52          } else {
  53              return parent::sanitize( $data, $type, $base );
  54          }
  55      }
  56  }