<?php

  // SANITIZE CHECKBOX INPUT //
  function azurelo_sanitize_checkbox( $input ) {
    // Boolean check
    return ( ( isset( $input ) && true == $input ) ? true : false );
  }


  // SANITIZE SELECT/RADIO INPUT //
  function azurelo_sanitize_select( $input, $setting ) {

    // Ensure input is a slug
    $input = sanitize_key( $input );

    // Get list of choices from the control
    // associated with the setting
    $choices = $setting->manager->get_control( $setting->id )->choices;

    // If the input is a valid key, return it;
    // otherwise, return the default
    return ( array_key_exists( $input, $choices ) ? $input : $setting->default );
  }


  // SANITIZE NUMBER INPUT //
  function azurelo_sanitize_number_absint( $number, $setting ) {
    // Ensure $number is an absolute integer (whole number, zero or greater).
    $number = absint( $number );

    // If the input is an absolute integer, return it; otherwise, return the default
    return ( $number ? $number : $setting->default );
  }


  // SANITIZE IMAGE //
  function azurelo_sanitize_image( $input, $setting ) {
    return esc_url_raw( azurelo_validate_image( $input, $setting->default ) );
  }

  function azurelo_validate_image( $input, $default = '' ) {
    // Array of valid image file types
    // The array includes image mime types
    // that are included in wp_get_mime_types()
    $mimes = array(
      'jpg|jpeg|jpe' => 'image/jpeg',
      'gif'          => 'image/gif',
      'png'          => 'image/png',
      'bmp'          => 'image/bmp',
      'tif|tiff'     => 'image/tiff',
      'ico'          => 'image/x-icon'
    );
    // Return an array with file extension
    // and mime_type
    $file = wp_check_filetype( $input, $mimes );
    // If $input has a valid mime_type,
    // return it; otherwise, return
    // the default.
    return ( $file['ext'] ? $input : $default );
  }


  // SANITIZE TEXT //
  function azurelo_sanitize_text( $input ) {
    global $allowedtags;
    return wp_kses( $input , $allowedtags );
  }


  // SANITIZE TEXT //
  function azurelo_sanitize_url( $input ) {
    return esc_url( $input );
  }


  // SANITIZE CSS //
  function azurelo_sanitize_css( $css ) {
    return wp_strip_all_tags( $css );
  }

  // SANITIZE CATEGORY //
  function azurelo_sanitize_category ( $input, $setting ) {
    // Ensure input is a slug
    $input = sanitize_key( $input );

    // If the input is a valid category, return it;
    // otherwise, return the default
    return is_string( get_the_category_by_ID( $input ) ) ? $input :  $setting->default;
  }

?>