CodeA　と　CodeB　は同じですか | Codetter（こーどったー）

// code a
$cats = isset($this->options['cathidden']) && is_serialized($this->options['cathidden']) ? unserialize($this->options['cathidden']) : array();

// code b
if ( isset($this->options['cathidden']) ) {
	if ( is_serialized($this->options['cathidden']) ) {
		$cats = unserialize($this->options['cathidden']);
	} else {
		$cats = array();
	}
}