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Edit File: Helper.class.php

<?php
if ( !defined( 'ABSPATH' ) ) exit;

if ( !class_exists( 'ewdufaqHelper' ) ) {
/**
 * Class to to provide helper functions
 *
 * @since 2.1.1
 */
class ewdufaqHelper {

// Hold the class instance.
  private static $instance = null;

/**
   * The constructor is private
   * to prevent initiation with outer code.
   * 
   **/
  private function __construct() {}

/**
   * The object is created from within the class itself
   * only if the class has no instance.
   */
  public static function getInstance() {

if ( self::$instance == null ) {

self::$instance = new ewdufaqHelper();
    }
 
    return self::$instance;
  }

/**
   * Handle ajax requests in admin area for logged out users
   * @since 2.1.1
   */
  public static function admin_nopriv_ajax() {

wp_send_json_error(
      array(
        'error' => 'loggedout',
        'msg'   => sprintf( __( 'You have been logged out. Please %slogin again%s.', 'ultimate-faqs' ), '<a href="' . wp_login_url( admin_url( 'admin.php?page=ewd-ufaq-dashboard' ) ) . '">', '</a>' ),
      )
    );
  }

/**
   * Handle ajax requests where an invalid nonce is passed with the request
   * @since 2.1.1
   */
  public static function bad_nonce_ajax() {

wp_send_json_error(
      array(
        'error' => 'badnonce',
        'msg'   => __( 'The request has been rejected because it does not appear to have come from this site.', 'ultimate-faqs' ),
      )
    );
  }

/**
   * Escapes PHP data being passed to JS, recursively
   * @since 2.1.0
   */
  public static function escape_js_recursive( $values ) {

$return_values = array();

foreach ( (array) $values as $key => $value ) {

if ( is_array( $value ) ) {

$value = ewdufaqHelper::escape_js_recursive( $value );
      }
      elseif ( ! is_scalar( $value ) ) {

continue;
      }
      else {

$value = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8' );
      }
      
      $return_values[ $key ] = $value;
    }

return $return_values;
  }
}

}

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