Title: WP_Customize_Manager::set_preview_url
Published: December 9, 2015
Last modified: February 24, 2026

---

# WP_Customize_Manager::set_preview_url( string $preview_url )

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#description)
 * [Parameters](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#parameters)
 * [Source](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#wp--skip-link--target)

Sets the initial URL to be previewed.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#description)󠁿

URL is validated.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#parameters)󠁿

 `$preview_url`stringrequired

URL to be previewed.

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#source)󠁿

    ```php
    public function set_preview_url( $preview_url ) {
    	$preview_url       = sanitize_url( $preview_url );
    	$this->preview_url = wp_validate_redirect( $preview_url, home_url( '/' ) );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-customize-manager.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-wp-customize-manager.php#L4608)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-wp-customize-manager.php#L4608-L4611)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#related)󠁿

| Uses | Description | 
| [wp_validate_redirect()](https://developer.wordpress.org/reference/functions/wp_validate_redirect/)`wp-includes/pluggable.php` |

Validates a URL for use in a redirect.

  | 
| [sanitize_url()](https://developer.wordpress.org/reference/functions/sanitize_url/)`wp-includes/formatting.php` |

Sanitizes a URL for database or redirect usage.

  | 
| [home_url()](https://developer.wordpress.org/reference/functions/home_url/)`wp-includes/link-template.php` |

Retrieves the URL for the current site where the front end is accessible.

  |

[Show 1 more](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#)
[Show less](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#)

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_customize_manager/set_preview_url/?output_format=md#changelog)󠁿

| Version | Description | 
| [4.4.0](https://developer.wordpress.org/reference/since/4.4.0/) | Introduced. |

## User Contributed Notes

You must [log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fdeveloper.wordpress.org%2Freference%2Fclasses%2Fwp_customize_manager%2Fset_preview_url%2F)
before being able to contribute a note or feedback.