wp_register_style() – Function | Developer.WordPress.org

Registers a CSS stylesheet.

Description

Parameters

$handlestringrequired: Name of the stylesheet. Should be unique.
$srcstring|falserequired: Full URL of the stylesheet, or path of the stylesheet relative to the WordPress root directory.
If source is set to false, stylesheet is an alias of other stylesheets it depends on.
$depsstring[]optional: An array of registered stylesheet handles this stylesheet depends on.
Default:array()
$verstring|bool|nulloptional: String specifying stylesheet version number, if it has one, which is added to the URL as a query string for cache busting purposes. If version is set to false, a version number is automatically added equal to current installed WordPress version.
If set to null, no version is added.
Default:false
$mediastringoptional: The media for which this stylesheet has been defined.
Default 'all'. Accepts media types like 'all', 'print' and 'screen', or media queries like ‘(orientation: portrait)’ and ‘(max-width: 640px)’.
Default:'all'

Return

bool Whether the style has been registered. True on success, false on failure.

Source

function wp_register_style( $handle, $src, $deps = array(), $ver = false, $media = 'all' ) {
	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );

	return wp_styles()->add( $handle, $src, $deps, $ver, $media );
}

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Uses	Description
wp_styles()`wp-includes/functions.wp-styles.php`	Initializes $wp_styles if it has not been set.

Used by	Description
wp_enqueue_emoji_styles()`wp-includes/formatting.php`	Enqueues the important emoji-related styles.
wp_enqueue_embed_styles()`wp-includes/embed.php`	Enqueues the CSS in the embed iframe header.
wp_enqueue_block_template_skip_link()`wp-includes/theme-templates.php`	Enqueues the skip-link script & styles.
WP_Duotone::output_footer_assets()`wp-includes/class-wp-duotone.php`	Outputs all necessary SVG for duotone filters, CSS for classic themes.
wp_enqueue_stored_styles()`wp-includes/script-loader.php`	Fetches, processes and compiles stored core styles, then combines and renders them to the page.
_wp_theme_json_webfonts_handler()`wp-includes/deprecated.php`	Runs the theme.json webfonts handler.
wp_enqueue_global_styles_css_custom_properties()`wp-includes/script-loader.php`	Function that enqueues the CSS Custom Properties coming from theme.json.
wp_enqueue_block_style()`wp-includes/script-loader.php`	Enqueues a stylesheet for a specific block.
wp_enqueue_global_styles()`wp-includes/script-loader.php`	Enqueues the global styles defined via theme.json.
register_block_style_handle()`wp-includes/blocks.php`	Finds a style handle for the block metadata field. It detects when a path to file was provided and registers the style under automatically generated handle name. It returns unprocessed style handle otherwise.

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Changelog

Version	Description
4.3.0	A return value was added.
2.6.0	Introduced.

User Contributed Notes

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Ivan Shulev 10 years ago

You must log in to vote on the helpfulness of this noteVote results for this note: 6You must log in to vote on the helpfulness of this note
Examples
In a Plugin (outside a PHP class)

Assumes the Plugin directory is named ‘my-plugin’.
Assumes the Plugin style sheet is named ‘plugin.css’.
```
/**
 * Registers a stylesheet.
 */
function wpdocs_register_plugin_styles() {
	wp_register_style( 'my-plugin', plugins_url( 'my-plugin/css/plugin.css' ) );
	wp_enqueue_style( 'my-plugin' );
}
// Register style sheet.
add_action( 'wp_enqueue_scripts', 'wpdocs_register_plugin_styles' );
```
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Ivan Shulev 10 years ago

Example
In a plugin (inside a PHP class)

Assumes the Plugin class name is ‘my_plugin’.
Assumes the Plugin directory is named ‘my-plugin’.
Assumes the Plugin style sheet is named ‘plugin.css’.

class WPDocs_My_Plugin_Stylesheet {

	/**
	 * Constructor.
	 */
	function __construct() {
		// Register stylesheet.
		add_action( 'wp_enqueue_scripts', array( $this, 'register_plugin_styles' ) );
	}

	/**
	 * Registers and enqueues stylesheet.
	 */
	public function register_plugin_styles() {
		wp_register_style( 'my-plugin', plugins_url( 'my-plugin/css/plugin.css' ) );
		wp_enqueue_style( 'my-plugin' );
	}
}
new WPDocs_My_Plugin_Stylesheet();

Skip to note 6 content

crstauf 4 years ago

You must log in to vote on the helpfulness of this noteVote results for this note: 1You must log in to vote on the helpfulness of this note

Note that Google Fonts has changed their URLs, so when embedding multiple font families only one will be loaded. The change is “fundamentally incompatible with how the rest of the world uses query variables and thus PHP itself”.

The fix is to set null on the $version parameter, which prevents the URL from being parsed and the additional font families lost.

Trac ticket: https://core.trac.wordpress.org/ticket/49742

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wp_register_style( string $handle, string|false $src, string[] $deps = array(), string|bool|null $ver = false, string $media = 'all' ): bool

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