Ticket #37638: 37638.option1.diff

src/wp-includes/class-wp-customize-manager.php

@@ -1013 +1013 @@
                         }
                         $validity = $setting->validate( $unsanitized_value );
                         if ( ! is_wp_error( $validity ) ) {
+                                /** This filter is documented in wp-includes/class-wp-customize-setting.php */
+                                $validity = apply_filters( "customize_validate_{$setting->id}", $validity, $unsanitized_value, $setting );
+                        }
+                        if ( ! is_wp_error( $validity ) ) {
                                 $value = $setting->sanitize( $unsanitized_value );
                                 if ( is_null( $value ) ) {
                                         $validity = false;