ID: 16044
Updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
-Status: Open
+Status: Duplicate
Bug Type: Session related
Operating System: Linux 2.4.7
PHP Version: 4.1.2
New Comment:
I actually read your code now.
You should return string type from read function _always_.
It's well known session bug, though.
Duplicate of #14529.
Previous Comments:
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[2002-03-21 16:40:00] [EMAIL PROTECTED]
backtrace as follows (this looks strange to me.. i did compile with
--enable-debug though..):
Program received signal SIGSEGV, Segmentation fault.
zend_hash_add_or_update (ht=0x40506514,
arKey=0x80f96e8 "?\226\017\b\b\227\017\b\f", nKeyLength=135239400,
pData=0xbfffee7c, nDataSize=4, pDest=0x0, flag=2) at
zend_hash.h:197
197 h ^= (ulong) *arKey++;
(gdb)
Continuing.
Cannot find user-level thread for LWP 8505: generic error
(gdb) bt
#0 zend_hash_add_or_update (ht=Error accessing memory address
0xbfffee50: No such process.
) at zend_hash.h:197
Error accessing memory address 0x4042901c: No such process.
------------------------------------------------------------------------
[2002-03-19 05:07:06] [EMAIL PROTECTED]
To properly diagnose this bug, we need a backtrace to see what is
happening behind the scenes. To find out how to generate a backtrace,
please read http://bugs.php.net/bugs-generating-backtrace.php
Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open".
------------------------------------------------------------------------
[2002-03-13 12:24:49] [EMAIL PROTECTED]
db_request() just sends whatever string to the sql database, and
db_single() returns a single result from a specified query, if that
helps.
------------------------------------------------------------------------
[2002-03-13 12:23:19] [EMAIL PROTECTED]
Using any handler BUT files for sessions seems to crash the PHP program
nine times out of ten - once the session is registered, however, it
seems to operate just fine.
Here's my session code, hope it will help.
<?PHP
require_once 'db.php';
$debug_session = 0;
$SESS_DBNAME = "mage";
$SESS_DBTABLE = "sessions";
//$SESS_LIFE = get_cfg_var("session.gc_maxlifetime");
$SESS_LIFE = 1800; // session data not refresh could run for 30 min?
function sess_open($save_path, $session_name) {
global $SESS_DBNAME, $SESS_DBTABLE, $debug_session;
return true;
}
function sess_close() {
global $debug_session;
return true;
}
function sess_read($key) {
global $debug_session, $SESS_DBNAME, $SESS_DBTABLE;
if($debug_session) echo "sess_read($key)<BR>";
$q = "SELECT svalue FROM $SESS_DBTABLE WHERE sesskey='$key' AND expire
< ".time();
$dbr = db_request($q);
if($dbr && mysql_num_rows($dbr)) {
$q = "DELETE FROM $SESS_DBTABLE WHERE sesskey='$key'";
db_request($q);
header("Location: expire.php");
exit;
}
$q = "SELECT svalue FROM $SESS_DBTABLE WHERE sesskey='$key' AND
expire > " . time();
$dbr = db_request($q);
if($debug_session) echo "msql($q) returns $dbr<BR>";
if(!$dbr) return false;
$value = mysql_fetch_row($dbr);
if($debug_session) echo "sess_read returning $value[0]<BR>";
return $value[0];
}
function sess_write($key, $val) {
global $user,$debug_session, $SESS_LIFE, $SESS_DBNAME,
$SESS_DBTABLE;
$expire = time() + (60 * 30);
$value = addslashes($val);
$q = "INSERT INTO $SESS_DBTABLE VALUES ('$key', $expire, '$value',
'$user[username]', '$user[location]', '$user[activity]')";
$dbr = db_request($q);
if($debug_session) echo "sess_write($key, $val)<BR>msql($q) returns
$dbr<BR>";
if(!$dbr) {
$q = "UPDATE $SESS_DBTABLE SET
location='$user[location]',activity='$user[activity]',username='$user[username]',expire=$expire,svalue='$value'
WHERE sesskey = '$key' AND expire > " . time();
$dbr = db_request($q);
}
if($debug_session) echo "sess_write() returning $dbr<BR>";
return $dbr;
}
function sess_destroy($key) {
global $debug_session, $SESS_DBNAME, $SESS_DBTABLE;
$q = "DELETE FROM $SESS_DBTABLE WHERE sesskey = '$key'";
$dbr = db_request($q);
if($debug_session) echo "sess_destroy($key)<BR>msql($q) return
$dbr<BR>";
return $dbr;
}
function sess_gc($maxlifetime) {
global $SESS_DBNAME, $SESS_DBTABLE;
$q = "DELETE FROM $SESS_DBTABLE WHERE expire < " . time();
$dbr = db_request($q);
return mysql_affected_rows();
}
function session_dump() {
$session_array = explode(';',session_encode());
$html = "<!-- SESSION VARIABLE DUMP\n\n";
for($x = 0; $x < count($session_array); $x++) {
$html .= " $session_array[$x] \n";
}
$html .= " -->\n\n";
echo $html;
}
function query_present($loc) {
global $SESS_DBTABLE;
$q = "location='$loc' and expire > ".time();
$f = "username,activity";
$dbr = db_array($SESS_DBTABLE, $q, $f);
if(!$dbr) return 0;
while($x = each($dbr)) {
$ret[$x['value']['username']] = $x['value']['activity'];
}
return $ret;
}
function query_num_online() {
global $SESS_DBTABLE;
$q = "expire > ".time();
$f = "count(*)";
$dbr = db_single($SESS_DBTABLE, $q, $f);
return $dbr[0];
}
session_set_save_handler("sess_open", "sess_close", "sess_read",
"sess_write", "sess_destroy", "sess_gc");
?>
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--
Edit this bug report at http://bugs.php.net/?id=16044&edit=1
