wp-includes/style-engine/class-wp-style-engine.php:661Style value parser that constructs a CSS definition array comprising a single CSS property and value.
$style_valuearray$style_definitionarraystring[] protected static function get_url_or_value_css_declaration( $style_value, $style_definition ) { if ( empty( $style_value ) ) { return array(); } $css_declarations = array(); if ( isset( $style_definition['property_keys']['default'] ) ) { $value = null; if ( ! empty( $style_value['url'] ) ) { $value = "url('" . $style_value['url'] . "')"; } elseif ( is_string( $style_value ) ) { $value = $style_value; } if ( null !== $value ) { $css_declarations[ $style_definition['property_keys']['default'] ] = $value; } } return $css_declarations; }Introduced in 6.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/style-engine/class-wp-style-engine.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.