protected function find_array_open_close( $stackPtr ) {
		/*
		 * Determine the array opener & closer.
		 */
		if ( \T_ARRAY === $this->tokens[ $stackPtr ]['code'] ) {
			if ( isset( $this->tokens[ $stackPtr ]['parenthesis_opener'] ) ) {
				$opener = $this->tokens[ $stackPtr ]['parenthesis_opener'];

				if ( isset( $this->tokens[ $opener ]['parenthesis_closer'] ) ) {
					$closer = $this->tokens[ $opener ]['parenthesis_closer'];
				}
			}
		} else {
			// Short array syntax.
			$opener = $stackPtr;

			if ( isset( $this->tokens[ $stackPtr ]['bracket_closer'] ) ) {
				$closer = $this->tokens[ $stackPtr ]['bracket_closer'];
			}
		}

		if ( isset( $opener, $closer ) ) {
			return array(
				'opener' => $opener,
				'closer' => $closer,
			);
		}

		return false;
	}