wp-includes/class-wp-duotone.php:466Parses a valid HSL[A] CSS color function/string.
$inputstringarray|null private static function colord_parse_hsla_string( $input ) { // Functional syntax. $is_match = preg_match( '/^hsla?\(\s*([+-]?\d*\.?\d+)(deg|rad|grad|turn)?\s*,\s*([+-]?\d*\.?\d+)%\s*,\s*([+-]?\d*\.?\d+)%\s*(?:,\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i', $input, $match ); if ( ! $is_match ) { // Whitespace syntax. $is_match = preg_match( '/^hsla?\(\s*([+-]?\d*\.?\d+)(deg|rad|grad|turn)?\s+([+-]?\d*\.?\d+)%\s+([+-]?\d*\.?\d+)%\s*(?:\/\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i', $input, $match ); } if ( ! $is_match ) { return null; } /* * For some reason, preg_match doesn't include empty matches at the end * of the array, so we add them manually to make things easier later. */ for ( $i = 1; $i <= 6; $i++ ) { if ( ! isset( $match[ $i ] ) ) { $match[ $i ] = ''; } } $hsla = self::colord_clamp_hsla( array( 'h' => self::colord_parse_hue( $match[1], $match[2] ), 's' => (float) $match[3], 'l' => (float) $match[4], 'a' => '' === $match[5] ? 1 : (float) $match[5] / ( $match[6] ? 100 : 1 ), ) ); return self::colord_hsla_to_rgba( $hsla ); }Introduced in 6.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-duotone.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.