问如何在mac上连接PostgreSQL和PHP？

EN

Warning: pg_connect(): Unable to connect to PostgreSQL server: FATAL: role "postgres" does not exist in /Users/username/Sites/index.php on line 3

Warning: pg_last_error(): No PostgreSQL link opened yet in /Users/username/Sites/index.php on line 4

Warning: pg_last_error(): supplied resource is not a valid PostgreSQL link resource in /Users/username/Sites/index.php on line 4
Could not connect:

<?php
  // Connecting, selecting database
  $dbconn = pg_connect("host=localhost dbname=ipl user=postgres password=password")
      or die('Could not connect: ' . pg_last_error());

  // Performing SQL query
  $query = 'SELECT * FROM player';
  $result = pg_query($query) or die('Query failed: ' . pg_last_error());

  // Printing results in HTML
  echo "<table>\n";
  while ($line = pg_fetch_array($result, null, PGSQL_ASSOC)) {
      echo "\t<tr>\n";
      foreach ($line as $col_value) {
          echo "\t\t<td>$col_value</td>\n";
        }
      echo "\t</tr>\n";
  }
  echo "</table>\n";

  // Free resultset
  pg_free_result($result);

  // Closing connection
  pg_close($dbconn);
  ?>