Php Programming Code Examples

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Using Postgres and PHP3 Authentication from a Web application



Using Postgres and PHP3 Authentication from a Web application

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//
// This little PHP script shows you how to connect to a Postgres 
// database via a browser with User/Password database 
// authentication using PHP3 authenticate function. 
//
// 1) You have to modify the $PGDATA/pg_hba.conf file: 
//    local   all                               trust 
//  -> trusting all connection for everyone on local machine 
//    host    all  127.0.0.1  255.255.255.255   password passwd 
//  -> using password like file (passwd made using pg_passwd tool 
//     to create user password account) to authenticate users 
//     from everywhere 
// 2) Just use the pg_Connect (or pg_pConnect) function with the 
//    connection string as follows. 
//


<?PHP 

//
// Authentication function - see previous archives for comments 
//

function authenticate() { 
  Header("WWW-authenticate: basic realm=\"Intranet MBDS\""); 
  Header("HTTP/1.0 401 Unauthorized"); 
    $title="Login invalide"; 
    ?> 
    In order to proceed you will need a valid username/password. 
    <? 
      exit; 
} 

//
// Postgres Connection 
//

function connect($user,$passwd) { 

  // You simply have to change the following variables to match 
  // your site configuration 
  // HOSTNAME = name of your postgres base host 
  // DBNAME = name of your postgres base 

  $conn = pg_Connect("host=HOSTNAME dbname=DBNAME port=5432   
                      user=$user password=$passwd"); 

  // Db connection problem 
  if (!$conn) { 
    echo "Database connection error.\n"; 
    exit; 
  } 

  // SQL order 
  $query_parent="SELECT * FROM xxxx WHERE xxxx"; 
  $result = pg_Exec($conn,$query_parent); 

  if (!$result) { 
    echo "SQL order problem.\n"; 
    exit; 
  } 

//  ... 

  // End of SQL statment 
  pg_FreeResult($result); 
  pg_Close($conn); 
}      
                 
//
// Main part of your PHP script 
// 


if (!isset($PHP_AUTH_USER)) { 
  authenticate(); 
} 
else { 
  connect($PHP_AUTH_USER,$PHP_AUTH_PW); 
} 

?>