WP_Style_Engine_Processor::get_css( array $options = array() ): string

Compatibility

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

Parameters

$optionsarrayoptional

An array of options. Default empty array.Default: array()

• $optimizebooldefault: false

  Whether to optimize the CSS output, e.g. combine rules.

• $prettifybool

  Whether to add new lines and indents to output. Defaults to whether the SCRIPT_DEBUG constant is defined.

Return value

string

The computed CSS.

Performance profile

How much work a call to WP_Style_Engine_Processor::get_css() 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

Touches nothing outside its own arguments.

Scaling

Scales with input

The body loops, so the work grows with what you pass in.

Instructions

22–28

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 47.

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 one call costs · 2 distinct outcomes

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

Uses · 3

• wp_parse_args()Merges user defined arguments into defaults array.
• WP_Style_Engine_Processor::add_rules()Adds rules to be processed.
• WP_Style_Engine_Processor::combine_rules_selectors()Combines selectors from the rules store when they have the same styles.

Source code

View on Trac ↗View on GitHub ↗

118	public function get_css( $options = array() ) {119		$defaults = array(120			'optimize' => false,121			'prettify' => defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG,122		);123		$options  = wp_parse_args( $options, $defaults );124 125		// If we have stores, get the rules from them.126		foreach ( $this->stores as $store ) {127			$this->add_rules( $store->get_all_rules() );128		}129 130		// Combine CSS selectors that have identical declarations.131		if ( true === $options['optimize'] ) {132			$this->combine_rules_selectors();133		}134 135		// Build the CSS.136		$css = '';137		foreach ( $this->css_rules as $rule ) {138			// See class WP_Style_Engine_CSS_Rule for the get_css method.139			$css .= $rule->get_css( $options['prettify'] );140			$css .= $options['prettify'] ? "\n" : '';141		}142		return $css;143	}

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/style-engine/class-wp-style-engine-processor.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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