twenty_twenty_one_scripts(): void

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Return value

void

Performance profile

How much work a call to twenty_twenty_one_scripts() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Heavy

Reaches the database via get_post().

Scaling

Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions

81–106

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 106.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

• optionoption read or writeget_option()called directly
• hookthird-party callbacksapply_filters()one call below twenty_twenty_one_scripts()
• querycontent queryget_post()one call below twenty_twenty_one_scripts()
• cacheobject cachewp_cache_get()one call below twenty_twenty_one_scripts()
• serializeserialisationmaybe_unserialize()one call below twenty_twenty_one_scripts()

Further down the call graph this can also reach transient. That is the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 8 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost twenty_twenty_one_scripts() can have, taken from its control-flow graph on PHP 8.5.

Uses · 11

• wp_enqueue_style()Enqueues a CSS stylesheet.
• get_template_directory_uri()Retrieves template directory URI for the active theme.
• wp_get_theme()Gets a WP_Theme object for a theme.
• wp_style_add_data()Adds metadata to a CSS stylesheet.
• is_singular()Determines whether the query is for an existing single post of any post type (post, attachment, page, custom post types).
• comments_open()Determines whether the current post is open for comments.
• get_option()Retrieves an option value based on an option name.
• wp_enqueue_script()Enqueues a script.
• wp_register_script()Registers a new script.
• has_nav_menu()Determines whether a registered nav menu location has a menu assigned to it.
• wp_get_theme()::get()

Source code

View on Trac ↗View on GitHub ↗

393function twenty_twenty_one_scripts() {394	// The standard stylesheet.395	wp_enqueue_style( 'twenty-twenty-one-style', get_template_directory_uri() . '/style.css', array(), wp_get_theme()->get( 'Version' ) );396 397	// RTL styles.398	wp_style_add_data( 'twenty-twenty-one-style', 'rtl', 'replace' );399 400	// Print styles.401	wp_enqueue_style( 'twenty-twenty-one-print-style', get_template_directory_uri() . '/assets/css/print.css', array(), wp_get_theme()->get( 'Version' ), 'print' );402 403	// Threaded comment reply styles.404	if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {405		wp_enqueue_script( 'comment-reply' );406	}407 408	// Register the handles for unused IE11 polyfill scripts.409	wp_register_script(410		'twenty-twenty-one-ie11-polyfills-asset',411		false,412		array(),413		wp_get_theme()->get( 'Version' ),414		array( 'in_footer' => true )415	);416	wp_register_script(417		'twenty-twenty-one-ie11-polyfills',418		false,419		array(),420		wp_get_theme()->get( 'Version' ),421		array( 'in_footer' => true )422	);423 424	// Main navigation scripts.425	if ( has_nav_menu( 'primary' ) ) {426		wp_enqueue_script(427			'twenty-twenty-one-primary-navigation-script',428			get_template_directory_uri() . '/assets/js/primary-navigation.js',429			array(),430			wp_get_theme()->get( 'Version' ),431			array(432				'in_footer' => false, // Because involves header.433				'strategy'  => 'defer',434			)435		);436	}437 438	// Responsive embeds script.439	wp_enqueue_script(440		'twenty-twenty-one-responsive-embeds-script',441		get_template_directory_uri() . '/assets/js/responsive-embeds.js',442		array(),443		wp_get_theme()->get( 'Version' ),444		array( 'in_footer' => true )445	);446}

Changelog

Introduced in Twenty Twenty-One 2.8 Removed Internet Explorer support.. Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-content/themes/twentytwentyone/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

Something wrong on this page? Report it and it gets fixed in the next regeneration.