Class to display inline diff using wordpress's native text diff engine

WP_Inline_Diffing.php

<?php
class wp_native_inline_diffing{
  public function diffcheck($oldValue, $newValue){	
      if ( ! class_exists( 'WP_Text_Diff_Renderer_inline', false ) )
        require( ABSPATH . WPINC . '/wp-diff.php' );

      $renderer = new WP_Text_Diff_Renderer_inline();
      $old_lines  = explode( "\n", $oldValue );
      $new_lines = explode( "\n", $newValue );
      $text_diff = new Text_Diff( 'auto', array( $old_lines, $new_lines ) );

      $diff = $renderer->render( $text_diff );
      $diff = $this->_rebuilt_diffed_html( $diff );
      return $diff;
  }

  public function _rebuilt_diffed_html( $string ){
      $string = htmlspecialchars_decode( $string );
      $string = str_replace( "<del> 	<li>", '<li><del>', $string);
      $string = str_replace( "</li></del>", '</del></li>', $string);
      $string = str_replace( "<ins> 	<li>", '<li><ins>', $string);
      $string = str_replace( "</li></ins>", '</ins></li>', $string);
      return $string;
  }
}
?>