WP_Style_Engine_Processor::add_rules( WP_Style_Engine_CSS_Rule|WP_Style_Engine_CSS_Rule[] $css_rules ): WP_Style_Engine_Processor

Compatibility

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

Parameters

$css_rulesWP_Style_Engine_CSS_Rule|WP_Style_Engine_CSS_Rule[]

A single, or an array of, WP_Style_Engine_CSS_Rule objects from a store or otherwise.

Return value

WP_Style_Engine_Processor

Returns the object to allow chaining methods.

Performance profile

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

Scales with input

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

Instructions

7–10

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 59.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

1

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

What one call costs · 1 distinct outcome

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

Used by · 1

• WP_Style_Engine_Processor::get_css()Gets the CSS rules as a string.

Source code

View on Trac ↗View on GitHub ↗

68	public function add_rules( $css_rules ) {69		if ( ! is_array( $css_rules ) ) {70			$css_rules = array( $css_rules );71		}72 73		foreach ( $css_rules as $rule ) {74			$selector    = $rule->get_selector();75			$rules_group = $rule->get_rules_group();76 77			/**78			 * If there is a rules_group and it already exists in the css_rules array,79			 * add the rule to it.80			 * Otherwise, create a new entry for the rules_group.81			 */82			if ( ! empty( $rules_group ) ) {83				if ( isset( $this->css_rules[ "$rules_group $selector" ] ) ) {84					$this->css_rules[ "$rules_group $selector" ]->add_declarations( $rule->get_declarations() );85					continue;86				}87				$this->css_rules[ "$rules_group $selector" ] = $rule;88				continue;89			}90 91			// If the selector already exists, add the declarations to it.92			if ( isset( $this->css_rules[ $selector ] ) ) {93				$this->css_rules[ $selector ]->add_declarations( $rule->get_declarations() );94				continue;95			}96			$this->css_rules[ $rule->get_selector() ] = $rule;97		}98 99		return $this;100	}

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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