WP_Styles::do_item( string $handle, int|false $group = false ): bool

Compatibility

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

Parameters

$handlestring

The style's registered handle.

$groupint|falseoptional

Group level: level (int), no groups (false).
Default false.Default: false

Return value

bool

True on success, false on failure.

Performance profile

How much work a call to WP_Styles::do_item() 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

Trivial

Touches nothing outside its own arguments.

Scaling

Constant

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

Instructions

38–188

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 258.

Plugin surface

1 hook

Third-party callbacks on 'style_loader_tag' run inside this call, and their cost is not bounded by anything here.

Called by

0

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

What it touches

• hookthird-party callbacksapply_filters()called directly

Further down the call graph this can also reach option, cache, serialize, query 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 · 28 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Styles::do_item() 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.

Hooks and filters fired · 2

2 hooks fire while WP_Styles::do_item() runs, in this order:

1. 1
   apply_filters( style_loader_tag )filterline 245 (+94 into the body)

   Filters the HTML link tag of an enqueued style.

2. 2
   apply_filters( style_loader_tag )filterline 266 (+115 into the body)

   Filters the HTML link tag of an enqueued style.

Uses · 6

• esc_attr()Escaping for HTML attributes.
• apply_filters()Calls the callback functions that have been added to a filter hook.
• WP_Dependencies::do_item()Processes a dependency.
• WP_Styles::print_inline_style()Prints extra CSS styles of a registered stylesheet.
• WP_Styles::in_default_dir()Whether a handle's source is in a default directory.
• WP_Styles::_css_href()Generates an enqueued style's fully-qualified URL.

Source code

View on Trac ↗View on GitHub ↗

151	public function do_item( $handle, $group = false ) {152		if ( ! parent::do_item( $handle ) ) {153			return false;154		}155 156		$obj = $this->registered[ $handle ];157		if ( $obj->extra['conditional'] ?? false ) {158 159			return false;160		}161		if ( null === $obj->ver ) {162			$ver = '';163		} else {164			$ver = $obj->ver ? $obj->ver : $this->default_version;165		}166 167		if ( isset( $this->args[ $handle ] ) ) {168			$ver = $ver ? $ver . '&amp;' . $this->args[ $handle ] : $this->args[ $handle ];169		}170 171		$src          = $obj->src;172		$inline_style = $this->print_inline_style( $handle, false );173 174		if ( $inline_style ) {175			$inline_style_tag = sprintf(176				"<style id='%s-inline-css'%s>\n%s\n</style>\n",177				esc_attr( $handle ),178				$this->type_attr,179				$inline_style180			);181		} else {182			$inline_style_tag = '';183		}184 185		if ( $this->do_concat ) {186			if ( $this->in_default_dir( $src ) && ! isset( $obj->extra['alt'] ) ) {187				$this->concat         .= "$handle,";188				$this->concat_version .= "$handle$ver";189 190				$this->print_code .= $inline_style;191 192				return true;193			}194		}195 196		if ( isset( $obj->args ) ) {197			$media = $obj->args;198		} else {199			$media = 'all';200		}201 202		// A single item may alias a set of items, by having dependencies, but no source.203		if ( ! $src ) {204			if ( $inline_style_tag ) {205				if ( $this->do_concat ) {206					$this->print_html .= $inline_style_tag;207				} else {208					echo $inline_style_tag;209				}210			}211 212			return true;213		}214 215		$href = $this->_css_href( $src, $ver, $handle );216		if ( ! $href ) {217			return true;218		}219 220		$rel   = isset( $obj->extra['alt'] ) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';221		$title = isset( $obj->extra['title'] ) ? $obj->extra['title'] : '';222 223		$tag = sprintf(224			"<link rel='%s' id='%s-css'%s href='%s'%s media='%s' />\n",225			$rel,226			esc_attr( $handle ),227			$title ? sprintf( " title='%s'", esc_attr( $title ) ) : '',228			$href,229			$this->type_attr,230			esc_attr( $media )

Changelog

Introduced in 2.6.0. 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 6.9.7 tag, from src/wp-includes/class-wp-styles.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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