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[2002-05-08 19:00 UTC] Lee dot Seldon at infotech dot monash dot edu dot au
Following is a login script which sets a session variable $userSN. First time it is run, it prompts for username and password, then sets the $userSN and displays "Welcome...". Second time it is run within a session, it checks isset($userSN) and displays "You are already logged in"
Performance:
Win98, Apache1.3.22, Netscape 4.75, php4.1.0 - first time - prompts as expected and displays "Welcome..", second time - displays "already logged in" as expected
Win98, Apache1.3.22, Netscape 4.75, php4.1.2 - first time - prompts as expected and displays "Welcome..", second time - prompts for name and password again, so $userSN has NOT been set or has disappeared. (Note: same behavior with Win2000 Pro, Apache1.3.22, Netscape 4.75, php4.1.0)
Win98, Apache1.3.22, Netscape 4.75, php4.2.0 - first time - prompts as expected, but on "submit" returns immediately to the prompt again.
PHP session parameters in php.ini are the default options.
Previous bug report 15867 - was claimed to have been fixed.
<?
// sets global $userSN
// $OnLine = true by default
//////////////////////////////////////////////////////////////////////
//Note:
// ensure no headers are called!
include("./HealthWebConfig.php");
include("./CommonFunction.php");
session_start(); // starting session
// session variables must be global
global $userSN;
// registering session variables
session_register("userSN");
// test if user is loged-in
?>
<html>
<head>
<script language="JavaScript">
<!-- Begin validation script
function validate_form()
{
if(document.loginForm.form_username.value == "")
{
alert('\nPlease enter a user name.');
document.loginForm.form_username.select();
document.loginForm.form_username.focus();
return false;
}
if(document.loginForm.form_password.value == "")
{
alert('\nPlease enter a password.');
document.loginForm.form_password.select();
document.loginForm.form_password.focus();
return false;
}
return true;
}
// End of validation script -->
</script>
</head>
<link rel=stylesheet type='text/css' href='style/display.css'>
<body bgcolor="#FFFFFF">
<?
if(isset($userSN))
{
printf("<H1>You have already logged in for this session.</H1><br>\n");
printf("<center>To logout click <a href=\"logout.php\">here.</a></center>");
printf("</body></html>");
exit;
}
//Check Password IF $userSN is NOT SET AND either clicked Submit or are off-line
if ($submit || ($OnLine == false)) {
$conn = odbc_connect( DB_PROVIDER_NAME, DB_PROVIDER_USERNAME, DB_PROVIDER_PASSWORD, DB_PROVIDER_CURSORTYPE);
// OFFLINE VERSION uses $DefaultPassword or $DefaultUserSN
if ($OnLine == false) {
$query = "SELECT ProviderSN, ProviderName, UserName, Password, RefereeStat
FROM Provider
WHERE ProviderSN = $DefaultUserSN;";
} //End of OnLine = False
else {
$form_password = md5($form_password);
$query = "SELECT ProviderSN, ProviderName, UserName, Password, RefereeStat
FROM Provider
WHERE UserName = '" . cleanString($form_username) . "'
AND Password = '" . cleanString($form_password) . "';";
} // end if online
$result = odbc_exec($conn, $query);
if(odbc_fetch_row($result, 1)) {
$realUserSN = odbc_result($result, 1);
$providerName = odbc_result($result, 2);
$userName = odbc_result($result, 3);
$realPassword = odbc_result($result, 4);
$refereeStat = odbc_result($result, 5);
$userSN = $realUserSN;
odbc_free_result($result);
odbc_close($conn);
if (isset($userSN)) {
printf("<FONT size=5><b>Welcome to Provider Login</b></FONT><br>");
printf("<FONT size=3>%s</FONT><br>\n", $providerName);
printf("<b><i>You are logged on from :</i></b> %s <br><br>\n", $REMOTE_ADDR);
}
else printf("<FONT size=5><b>ERROR setting session cookie</b></FONT><br>");
printf("</body></html>");
exit;
}
else { //didn't find the given password
$notFound = true;
}
odbc_free_result($result);
odbc_close($conn);
} //END of SUBMIT or ONLINE=false
?>
<div align="center">
<table border="0" width="100%">
<tr>
<td bgcolor="E6E6E6" width="70%">
<H1 align="center">Agency Login Page</H1>
<H5 align="center">Please note that cookies must be turned on in your
browser to keep track of your agency. <br>
Please contact the Mornington Div. of GP - 9769 6133 - for your password.</H5>
</td>
</tr>
</table>
<? if($notFound) { ?>
<H2><font color="#FF0000">Login Failed</font>. Please go try again. Remember
that the password is case-sensitive.</H2>
<? } ?>
</div>
<form method="post" name="loginForm" action="providerlogin.php" onSubmit="return validate_form()">
<div align="center">
<table width="400" align="center" border="0" cellpadding="3" cellspacing="0" bgcolor="#FF0000">
<tr>
<td colspan="2" align="left">
<center>
<strong><font face="verdana" color="#FFFFFF" size="-1">Please enter
Username & Password</font></strong>
</center>
</td>
</tr>
</table>
<table width="400" border="0" cellspacing="0" bgcolor="#E6E6E6">
<tr>
<td align="right"><br>
<font face="arial" size="2"><b>Username:</b></font></td>
<td><br>
<input NAME="form_username" value="" maxlength="12">
</td>
</tr>
<tr>
<td align="right"><font face="arial" size="2"><br>
<b>Password:</b></font></td>
<td><br>
<input NAME="form_password" type="password" maxlength="12">
</td>
</tr>
<tr>
<td colspan=2> </td>
</tr>
</table>
<table width="400" align="center" border="0" cellpadding="3" cellspacing="0" bgcolor="#FF0000">
<tr>
<td colspan="2" align="right">
<input type="submit" name="submit" value="Login">
</td>
<td>
<input type="reset" name="reset" value="Clear">
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
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Last updated: Fri Apr 19 09:01:27 2024 UTC |
I just tried the following script on Windows 2000 Pro and it works fine. <?php session_start(); print_r($_SESSION); if(!isset($_SESSION['i'])) { $_SESSION['i'] = 0; } $_SESSION['i']++; ?> Don't forget to set session.save_path in your php.ini! Also make sure the webserver has write access to that path.Here is a short version of my original script. Behavior is similar to the original: php 4.0.6 - 2nd time it is run, shows "You are logged in" php 4.1.2, 4.2.1 - 2nd time it is run, prompts again for username and password, so has lost the $userSN session variable <? //Note: // ensure no headers are called! session_start(); // starting session // session variables must be global global $userSN; // registering session variables session_register("userSN"); // test if user is logged-in ?> <html> <head> </head> <body bgcolor="#FFFFFF"> <? if(isset($userSN)) { printf("<H1>You have already logged in for this session.</H1><br>\n"); printf("<center>To logout click <a href=\"logout.php\">here.</a></center>"); printf("</body></html>"); exit; } //Check Password IF userSN is NOT SET AND clicked Submit if ($submit) { $form_password = md5($form_password); $userSN = $form_username; if (isset($userSN)) { printf("<FONT size=5><b>Welcome to Provider Login</b></FONT><br>"); printf("<FONT size=3>%s</FONT><br>\n", $providerName); printf("<b><i>You are logged on from :</i></b> %s <br><br>\n", $REMOTE_ADDR); } else printf("<FONT size=5><b>ERROR setting session cookie</b></FONT><br>"); printf("</body></html>"); exit; } //END of SUBMIT ?> <form method="post" name="loginForm" action="loginphp.php"> <div align="center"> <table width="400" border="0" cellspacing="0" bgcolor="#E6E6E6"> <tr> <td align="right"><br> <font face="arial" size="2"><b>Username:</b></font></td> <td><br> <input NAME="form_username" value="" maxlength="12"> </td> </tr> <tr> <td align="right"><font face="arial" size="2"><br> <b>Password:</b></font></td> <td><br> <input NAME="form_password" type="password" maxlength="12"> </td> </tr> <tr> <td colspan="2" align="right"> <input type="submit" name="submit" value="Login"> </td> </tr> </table> </div> </form> </body> </html>