diff --git a/wp-content/themes/apus-theme/functions.php b/wp-content/themes/apus-theme/functions.php
index 2183ad21..75b8fc2e 100644
--- a/wp-content/themes/apus-theme/functions.php
+++ b/wp-content/themes/apus-theme/functions.php
@@ -146,6 +146,11 @@ add_filter('date_format', 'apus_custom_date_format');
 /**
  * Include modular files
  */
+// Sanitize Functions (load first to avoid redeclaration errors)
+if (file_exists(get_template_directory() . '/inc/sanitize-functions.php')) {
+    require_once get_template_directory() . '/inc/sanitize-functions.php';
+}
+
 // Theme Options Helpers (load first as other files may depend on it)
 if (file_exists(get_template_directory() . '/inc/theme-options-helpers.php')) {
     require_once get_template_directory() . '/inc/theme-options-helpers.php';
diff --git a/wp-content/themes/apus-theme/inc/admin/options-api.php b/wp-content/themes/apus-theme/inc/admin/options-api.php
index 89f61b31..0180e82f 100644
--- a/wp-content/themes/apus-theme/inc/admin/options-api.php
+++ b/wp-content/themes/apus-theme/inc/admin/options-api.php
@@ -231,16 +231,6 @@ function apus_sanitize_js($js) {
     return trim($js);
 }
 
-/**
- * Sanitize checkbox input
- *
- * @param mixed $input The input value
- * @return bool
- */
-function apus_sanitize_checkbox($input) {
-    return (bool) $input;
-}
-
 /**
  * Sanitize integer input
  *
diff --git a/wp-content/themes/apus-theme/inc/adsense-delay.php b/wp-content/themes/apus-theme/inc/adsense-delay.php
index c27152c5..aa6ca626 100644
--- a/wp-content/themes/apus-theme/inc/adsense-delay.php
+++ b/wp-content/themes/apus-theme/inc/adsense-delay.php
@@ -152,12 +152,3 @@ function apus_adsense_delay_customizer($wp_customize) {
 }
 add_action('customize_register', 'apus_adsense_delay_customizer');
 
-/**
- * Sanitize checkbox input
- *
- * @param bool $checked Whether the checkbox is checked
- * @return bool Sanitized value
- */
-function apus_sanitize_checkbox($checked) {
-    return (isset($checked) && $checked === true || $checked === '1') ? true : false;
-}
diff --git a/wp-content/themes/apus-theme/inc/critical-css.php b/wp-content/themes/apus-theme/inc/critical-css.php
index 7f95afb5..a20502e9 100644
--- a/wp-content/themes/apus-theme/inc/critical-css.php
+++ b/wp-content/themes/apus-theme/inc/critical-css.php
@@ -351,17 +351,6 @@ function apus_critical_css_customizer( $wp_customize ) {
 }
 add_action( 'customize_register', 'apus_critical_css_customizer' );
 
-/**
- * Sanitize checkbox value
- *
- * @since 1.0.0
- * @param bool $checked Whether the checkbox is checked.
- * @return bool
- */
-function apus_sanitize_checkbox( $checked ) {
-	return ( isset( $checked ) && true === $checked ) ? true : false;
-}
-
 /**
  * Clear critical CSS cache when theme is updated
  *
diff --git a/wp-content/themes/apus-theme/inc/customizer-fonts.php b/wp-content/themes/apus-theme/inc/customizer-fonts.php
index 5afaa2f2..81c6b251 100644
--- a/wp-content/themes/apus-theme/inc/customizer-fonts.php
+++ b/wp-content/themes/apus-theme/inc/customizer-fonts.php
@@ -77,21 +77,6 @@ function apus_customize_register_fonts($wp_customize) {
 
 add_action('customize_register', 'apus_customize_register_fonts');
 
-/**
- * Sanitize checkbox
- */
-function apus_sanitize_checkbox($input) {
-    return (isset($input) && true === $input) ? true : false;
-}
-
-/**
- * Sanitize select
- */
-function apus_sanitize_select($input, $setting) {
-    $choices = $setting->manager->get_control($setting->id)->choices;
-    return (array_key_exists($input, $choices) ? $input : $setting->default);
-}
-
 /**
  * Check if custom fonts are enabled
  */
diff --git a/wp-content/themes/apus-theme/inc/sanitize-functions.php b/wp-content/themes/apus-theme/inc/sanitize-functions.php
new file mode 100644
index 00000000..9a10dfe6
--- /dev/null
+++ b/wp-content/themes/apus-theme/inc/sanitize-functions.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * Funciones de sanitización para el tema APUS
+ *
+ * Este archivo centraliza todas las funciones de sanitización utilizadas
+ * en el Customizer, panel de opciones y demás componentes del tema.
+ *
+ * @package APUS_Theme
+ * @since 1.0.0
+ */
+
+// Exit if accessed directly
+if (!defined('ABSPATH')) {
+    exit;
+}
+
+if (!function_exists('apus_sanitize_checkbox')) {
+    /**
+     * Sanitiza valores de checkbox
+     *
+     * Convierte cualquier valor a boolean para asegurar que solo
+     * se guarden valores true/false en la base de datos.
+     *
+     * @param mixed $input Valor a sanitizar
+     * @return bool Valor sanitizado como boolean
+     * @since 1.0.0
+     */
+    function apus_sanitize_checkbox($input) {
+        return (bool) $input;
+    }
+}
+
+if (!function_exists('apus_sanitize_select')) {
+    /**
+     * Sanitiza valores de select
+     *
+     * Verifica que el valor seleccionado existe en las opciones disponibles.
+     * Si no existe, retorna el valor por defecto del setting.
+     *
+     * @param mixed  $input   Valor a sanitizar
+     * @param object $setting Setting object del Customizer
+     * @return string Valor sanitizado
+     * @since 1.0.0
+     */
+    function apus_sanitize_select($input, $setting) {
+        // Asegurar que el setting tiene las opciones disponibles
+        $choices = $setting->manager->get_control($setting->id)->choices;
+
+        // Retornar el input si es una opción válida, de lo contrario retornar el default
+        return (array_key_exists($input, $choices) ? $input : $setting->default);
+    }
+}