PHP，PDO Connect语句

Question

I'm not that awesome with PDO, been learning it to update my PHP standards, I thought I had it cracked,however I keep getting an error.

I have used this before and it works and there is nothing I can see that has changed.

        echo "before connect";
        $conn = new PDO('mysql:host=hostadd;dbname=dbname', $username, $password);
        $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        echo "past connect";

This is my code, the password and server address are correct, as are the variable values that are defined before this statement.

I never make it to the past connect echo though, and I always get this error:

before connectError: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known

Can anyone tell me what daft mistake I am making?

Answer 1

This problem has nothing to do with PDO. To connect an internet service you have to supply a valid and working host name.