尝试赶上课堂

Question

我只是创建一个从PDO封装的类。我想从我的新类中得到的东西是包装Try和Catch每个方法以捕获错误。但是，似乎try catch不在类内部执行。

class aegis{
    private $init, $dsn, $user, $pass;
    private $options = [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_CASE => PDO::CASE_NATURAL,
        PDO::ATTR_ORACLE_NULLS => PDO::NULL_EMPTY_STRING  
    ];

    public function __construct($host, $port, $db_name, $user, $pass){
        $this->dsn = 'mysql:host='.$host.';port='.$port.';dbname='.$db_name;
        $this->user = $user;
        $this->pass = $pass;
        $this->connect();
    }

    private function connect(){
        $this->init = new PDO($this->dsn, $this->user, $this->pass, $this->options);
    }

    public function select($sqlStatement = NULL){
        if($sqlStatement !== NULL){ $this->init->query($sqlStatement); }  
    }

    public function insert($sqlStatement = NULL){
        if($sqlStatement !== NULL){ $this->init->query($sqlStatement); }  
    }

    public function logError(){
        try{
            $this->__construct();
            $this->select();
            $this->insert();
        }catch(PDOException $e){
            $error;

            array_push($error, $e->getCode());
            array_push($error, $e->getMessage());

            return $error;
        }
    }   
}

示例用法：

$aegis = new aegis($credential);

$error = $aegis->logError();

echo '<pre>';
print_r($error);
echo '<pre>';