wp_get_typography_font_size_value( array $preset, bool|array $settings = array() ): string|null

Description

Compatibility

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

Parameters

$presetarray

Required. fontSizes preset value as seen in theme.json.

• $namestring

  Name of the font size preset.

• $slugstring

  Kebab-case, unique identifier for the font size preset.

• $sizestring|int|float

  CSS font-size value, including units if applicable.

$settingsbool|arrayoptional

Optional Theme JSON settings array that overrides any global theme settings.
Default is false.Default: array()

Return value

string|null

Font-size value or null if a size is not passed in $preset.

Performance profile

How much work a call to wp_get_typography_font_size_value() 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

Light

Only touches the object cache, via wp_cache_get().

Scaling

Constant

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

Instructions

11–142

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 183.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

5

5 places in core call this, so the cost is paid more often than your own code shows.

What it touches

• hookthird-party callbacksdo_action()one call below wp_get_typography_font_size_value()
• cacheobject cachewp_cache_get()one call below wp_get_typography_font_size_value()

Further down the call graph this can also reach query, option, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 9 distinct outcomes

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

This body has more branch combinations than are worth enumerating, so the table covers the outcomes found first rather than every one that exists.

Uses · 7

• _deprecated_argument()Marks a function argument as deprecated and inform when it has been used.
• __()Retrieves the translation of $text.
• wp_get_global_settings()Gets the settings resulting of merging core, theme, and user data.
• wp_parse_args()Merges user defined arguments into defaults array.
• wp_get_typography_value_and_unit()Checks a string for a unit and value and returns an array consisting of `'value'` and `'unit'`, e.g. array( '42', 'rem' ).
• clamp()Polyfill for `clamp()` function added in PHP 8.6.
• wp_get_computed_fluid_typography_value()Internal implementation of CSS clamp() based on available min/max viewport width and min/max font sizes.

Used by · 5

• WP_Theme_JSON::compute_style_properties()Given a styles array, it extracts the style properties and adds them to the $declarations array following the format:
• block_core_navigation_link_build_css_font_sizes()Build an array with CSS classes and inline styles defining the font sizes which will be applied to the navigation markup in the front-end.
• get_typography_styles_for_block_core_search()Returns typography styles to be included in an HTML style tag.
• wp_apply_typography_support()Adds CSS classes and inline styles for typography features such as font sizes to the incoming attributes array. This will be applied to the block markup in the front-end.
• wp_render_typography_support()Renders typography styles/content to the block wrapper.

Source code

View on Trac ↗View on GitHub ↗

565function wp_get_typography_font_size_value( $preset, $settings = array() ) {566	if ( ! isset( $preset['size'] ) ) {567		return null;568	}569 570	/*571	 * Catches falsy values and 0/'0'. Fluid calculations cannot be performed on `0`.572	 * Also returns early when a preset font size explicitly disables fluid typography with `false`.573	 */574	$fluid_font_size_settings = $preset['fluid'] ?? null;575	if ( false === $fluid_font_size_settings || empty( $preset['size'] ) ) {576		return $preset['size'];577	}578 579	/*580	 * As a boolean (deprecated since 6.6), $settings acts as an override to switch fluid typography "on" (`true`) or "off" (`false`).581	 */582	if ( is_bool( $settings ) ) {583		_deprecated_argument( __FUNCTION__, '6.6.0', __( '`boolean` type for second argument `$settings` is deprecated. Use `array()` instead.' ) );584		$settings = array(585			'typography' => array(586				'fluid' => $settings,587			),588		);589	}590 591	// Fallback to global settings as default.592	$global_settings = wp_get_global_settings();593	$settings        = wp_parse_args(594		$settings,595		$global_settings596	);597 598	$typography_settings = $settings['typography'] ?? array();599 600	/*601	 * Return early when fluid typography is disabled in the settings, and there602	 * are no local settings to enable it for the individual preset.603	 *604	 * If this condition isn't met, either the settings or individual preset settings605	 * have enabled fluid typography.606	 */607	if ( empty( $typography_settings['fluid'] ) && empty( $fluid_font_size_settings ) ) {608		return $preset['size'];609	}610 611	$fluid_settings  = $typography_settings['fluid'] ?? array();612	$layout_settings = $settings['layout'] ?? array();613 614	// Defaults.615	$default_maximum_viewport_width       = '1600px';616	$default_minimum_viewport_width       = '320px';617	$default_minimum_font_size_factor_max = 0.75;618	$default_minimum_font_size_factor_min = 0.25;619	$default_scale_factor                 = 1;620	$default_minimum_font_size_limit      = '14px';621 622	// Defaults overrides.623	$minimum_viewport_width = $fluid_settings['minViewportWidth'] ?? $default_minimum_viewport_width;624	$maximum_viewport_width = isset( $layout_settings['wideSize'] ) && ! empty( wp_get_typography_value_and_unit( $layout_settings['wideSize'] ) ) ? $layout_settings['wideSize'] : $default_maximum_viewport_width;625	if ( isset( $fluid_settings['maxViewportWidth'] ) ) {626		$maximum_viewport_width = $fluid_settings['maxViewportWidth'];627	}628	$has_min_font_size       = isset( $fluid_settings['minFontSize'] ) && ! empty( wp_get_typography_value_and_unit( $fluid_settings['minFontSize'] ) );629	$minimum_font_size_limit = $has_min_font_size ? $fluid_settings['minFontSize'] : $default_minimum_font_size_limit;630 631	// Try to grab explicit min and max fluid font sizes.632	$minimum_font_size_raw = $fluid_font_size_settings['min'] ?? null;633	$maximum_font_size_raw = $fluid_font_size_settings['max'] ?? null;634 635	// Font sizes.636	$preferred_size = wp_get_typography_value_and_unit( $preset['size'] );637 638	// Protects against unsupported units.639	if ( empty( $preferred_size['unit'] ) ) {640		return $preset['size'];641	}642 643	/*644	 * Normalizes the minimum font size limit according to the incoming unit,

Changelog

Introduced in 6.1.0. 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-includes/block-supports/typography.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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