调试PHP到PostgreSQL连接

What is the best way to see whats going on with a PHP connection to a PostgreSQL database from the log?

I've edited my "postgresql.conf" file to include debugging level 5 information (debug5) (maybe not needed??):

client_min_messages = debug5
log_min_messages = debug5
log_min_error_statement = debug5

however, the ./pg_log/postgresql-*.log file doesn't seem to include any helpful command or failed login information from PHP??

./pg_log/postgresql-*.log:

DEBUG:  pg_toast_2619: vac: 0 (threshold 52), anl: 0 (threshold 51)
DEBUG:  CommitTransaction
DEBUG:  name: unnamed; blockState:       STARTED; state: INPROGR, xid/subid/cid: 0/1/0, nestlvl: 1, children: 
DEBUG:  shmem_exit(0): 8 callbacks to make
DEBUG:  proc_exit(0): 2 callbacks to make
DEBUG:  exit(0)
DEBUG:  shmem_exit(-1): 0 callbacks to make
DEBUG:  proc_exit(-1): 0 callbacks to make
DEBUG:  reaping dead processes
DEBUG:  server process (PID 20524) exited with exit code 0

PHP:

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

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

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

// Free resultset                                                                              
pg_free_result($result);                                                                       

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

Is there anyway to see whats going on with the PHP connection to PostgreSQL in detail? The other log files in ./pg_clog/ look like "0000" and are binary? I'm using the default values for everything else in the postgresql.conf file.