<?php

$servername = "localhost";
$username = "postgres";
$password = "test123";
$dbname = "testdb";

$conn = new PDO("pgsql:host=$servername;dbname=$dbname", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

if(!$conn){
echo "error in conn";
} else {
echo "success";
}

?>