Gracias a Todos por vuestra Ayuda.
Gracias Cluster por tu script que he visto por ahi y he votado.
Espero que me puedas ayudar con esto (no utilizo tu script en este caso)
1. el gestor de sessiones es el siguiente:
Código PHP:
<?
/* ------------------------------------------------------------------------
* session_mysql.php
* ------------------------------------------------------------------------
* PHP4 MySQL Session Handler
* Version 1.00
* by Ying Zhang ([email protected])
* Last Modified: May 21 2000
*
* ------------------------------------------------------------------------
* TERMS OF USAGE:
* ------------------------------------------------------------------------
* You are free to use this library in any way you want, no warranties are
* expressed or implied. This works for me, but I don't guarantee that it
* works for you, USE AT YOUR OWN RISK.
*
* While not required to do so, I would appreciate it if you would retain
* this header information. If you make any modifications or improvements,
* please send them via email to Ying Zhang <[email protected]>.
*
* ------------------------------------------------------------------------
* DESCRIPTION:
* ------------------------------------------------------------------------
* This library tells the PHP4 session handler to write to a MySQL database
* instead of creating individual files for each session.
*
* Create a new database in MySQL called "sessions" like so:
*
* CREATE TABLE sessions (
* sesskey char(32) not null,
* expiry int(11) unsigned not null,
* value text not null,
* PRIMARY KEY (sesskey)
* );
*
* ------------------------------------------------------------------------
* INSTALLATION:
* ------------------------------------------------------------------------
* Make sure you have MySQL support compiled into PHP4. Then copy this
* script to a directory that is accessible by the rest of your PHP
* scripts.
*
* ------------------------------------------------------------------------
* USAGE:
* ------------------------------------------------------------------------
* Include this file in your scripts before you call session_start(), you
* don't have to do anything special after that.
*/
$SESS_DBHOST = $servidor; /* database server hostname */
$SESS_DBNAME = $basedatos; /* database name */
$SESS_DBUSER = $usuario; /* database user */
$SESS_DBPASS = $clave; /* database password */
$SESS_DBH = "";
$SESS_LIFE = 14400; //3600seg = 1hora Antes: get_cfg_var("session.gc_maxlifetime");
//14400seg = 4horas
function sess_open($save_path, $session_name) {
global $SESS_DBHOST, $SESS_DBNAME, $SESS_DBUSER, $SESS_DBPASS, $SESS_DBH;
if (! $SESS_DBH = mysql_pconnect($SESS_DBHOST, $SESS_DBUSER, $SESS_DBPASS)) {
echo "<li>Can't connect to $SESS_DBHOST as $SESS_DBUSER";
echo "<li>MySQL Error: ", mysql_error();
die;
}
if (! mysql_select_db($SESS_DBNAME, $SESS_DBH)) {
echo "<li>Unable to select database $SESS_DBNAME";
die;
}
return true;
}
function sess_close() {
return true;
}
function sess_read($key) {
global $SESS_DBH, $SESS_LIFE;
$qry = "SELECT value FROM sessions WHERE sesskey = '$key' AND expiry > " . time();
$qid = mysql_query($qry, $SESS_DBH);
if (list($value) = mysql_fetch_row($qid)) {
return $value;
}
return false;
}
function sess_write($key, $val) {
global $SESS_DBH, $SESS_LIFE;
$expiry = time() + $SESS_LIFE;
$value = addslashes($val);
$qry = "INSERT INTO sessions VALUES ('$key', $expiry, '$value')";
$qid = mysql_query($qry, $SESS_DBH);
if (! $qid) {
$qry = "UPDATE sessions SET expiry = $expiry, value = '$value' WHERE sesskey = '$key' AND expiry > " . time();
$qid = mysql_query($qry, $SESS_DBH);
}
//echo $qry."<br>";
return $qid;
}
function sess_destroy($key) {
global $SESS_DBH;
$qry = "DELETE FROM sessions WHERE sesskey = '$key'";
$qid = mysql_query($qry, $SESS_DBH);
return $qid;
}
function sess_gc($maxlifetime) {
global $SESS_DBH;
$qry = "DELETE FROM sessions WHERE expiry < " . time();
$qid = mysql_query($qry, $SESS_DBH);
return mysql_affected_rows($SESS_DBH);
}
session_set_save_handler(
"sess_open",
"sess_close",
"sess_read",
"sess_write",
"sess_destroy",
"sess_gc");
?> y tengo una base de datos con tabla usuarios donde hay un campo llamado tipousuario que contiene 4 elemento.
Me gustaría que alguien me enseñase es a hacer lo siguiente:
meter un código en unas cuantas páginas de mi web, q permita restringir el acceso: si un usuario no esta registrado o no pertenece al nivel 3 (con posibilidad de meter mas de un nivel), no vea el contenido de la página y sea redirigido a una de registro o solicitud de cambio de nivel al nivel que le permita ver dicho contenido.
Gracias.