PHP数据库连接问题与异常[重复]

Question

This question already has an answer here:

• why this warning came ::::::mysql_connect(): php_network_getaddresses: getaddrinfo failed: No such host is known [closed] 1 answer

so this is my code:

<?php 

    class DB{

        private $host       = 'loscalhost';
        private $user       = 'root';
        private $password   = '';

        function __construct(){
            try {
                $connect_db = mysql_connect($this->host, $this->user, $this->password);
            }catch(Exception $e){
                echo 'DB connection failed: ',  var_dump($e), "
";
            }
        }
}

I changed the host variable value so i can display the message DB connection failed..., but my question is why is it not displayed? instead i get this: Warning: mysql_connect(): php_network_getaddresses: getaddrinfo failed: No such host is known

</div>

Answer 1

Host name is localhost but you used loscalhost

 private $host = 'loscalhost';

should be

private $host = 'localhost';