• ERROR: permission denied for relation birthdays
  SQL state: 42501
  
• A table was not introduced as a Public (schema): ( Accessing with PHP code )
  
  Browser Used : Chrome browser displaying error and line numbers in the script.
  
• GRANT SELECT ON birthdays TO PUBLIC;
• Tables with Public attributes:
  select tablename as table from pg_tables
  where schemaname = 'public
• Tables having PUBLIC  attributes can be accessed by all users

<?php
echo "debug OK <br/>";
//$dbconn= pg_connect("dbname=postgres") or die("Could not connect");
$dbconn= pg_connect("host=localhost dbname=postgres user=postgres password=postgre_manas9")
or die("Can't connect to database".pg_last_error());
//$dbconn= pg_connect("host=localhost dbname=pgsdemo1 user=manas237 password=pwmanas237")
// or die("Can't connect to database".pg_last_error());
$sql = "Select * from birthdays";
$result = pg_query($dbconn, $sql);
if ($result) {
echo "The query executed successfully.<br />\n";
}
echo " db connected <br/>";
pg_close($dbconn);
echo" db:: closed with pg_close() function <br/>";
?>

Error in Accessing the table,  "birthdays"

• r -- SELECT ("read")
• w -- UPDATE ("write")
• a -- INSERT ("append")
• d -- DELETE
• D -- TRUNCATE
• x -- REFERENCES
• t -- TRIGGER
• X -- EXECUTE
• U -- USAGE
• C -- CREATE
• c -- CONNECT
• T -- TEMPORARY

Uses:

GRANT INSERT ON table_name TO PUBLIC;
GRANT SELECT, UPDATE, INSERT ON table_name TO an_user;
GRANT SELECT (col1), UPDATE (col1) ON table_name TO an_user;

Chrome browser : error accessing the table birthdays:

Granting privileges: "grant all privileges on database pgsdemo1 to manas237; "

GRANTING Public attribute to the table "birthdays", only.

All users now can access This table with PHP scripts.