php - Cannot connect to database phppgadmin

Question

I cannot connect to the database. I already have phppgadmin and made a new database and table already. In my php file i encoded:

<?php
 $conn = pgconnect ("host = localhost dbname = sign_in         user = postgre password = 123456");
 if (!$conn){
   Echo "ERROR";
   }
?>

What should i do?