php sessions

php_novice2007 · April 3, 2007

Hi,

I added php sessions to my code and now my javascripts on loginForm.php doesn't work!.. It goes straight to invalid login if say I didn't type in anything and just pressed submit.. it was working before I added the session stuff... Why does it not do my javascript now..

<html>
<head>
<script type="text/javascript">
function check_myform1() {
  if((myform1.userid.value.length == 0)) {
    alert("Please enter user id");
    myform1.userid.focus();
    return false;
  }
  if((myform1.password.value.length == 0)) {
      alert("Pleas enter password");
      myform1.password.focus();
      return false;
  } 
  return true;
}
</script>
</head>
<body>

<br>
<form name="myform1" action='loginck.php' method=post onSubmit="return check_myform1();">
<table>
<tr><td>Login Name</td><td><input type ='text' name='login' ></td></tr>
<tr><td>Password</td><td><input type ='password' name='password' ></td></tr>
<tr><td><input type='submit' value='Submit'><input type='reset' value='Reset'></td> </tr>
</table></form>

</body>
</html>

loginck.php:

<?php
  
  if (isset($_POST['login']) && isset($_POST['password'])) {
    $userid = $_POST['login'];
    $passWord = $_POST['password'];
  
  	$database="red1";
  	$dbtable = "users";
  	$link=mysql_connect("localhost", root, abcd) or die("Cannot connect to database");
  
  	//select database
  	@mysql_select_db($database) or die("Unable to select database");
  
  	//Look for a record with matching user_id, not case sensitive
  	$query="SELECT * FROM $dbtable WHERE user_id = '$userid'";
  	$result=mysql_query($query, $link) or die("Unable to load selected table");
  
  	//find out how many rows there are in the database
  	$num=mysql_num_rows($result);
  
  	mysql_close($link) or die("Unable to close database");
  
  	if ($num < 1) {
  	  // no matching user_id
      echo "Invalid Login details <br> Please <a href=loginForm.html>go back</a> and try again";
    } else {
      // check the user_id, case sensitive, and password
      $i=0;
      $match = 0;
      $unitsViewable;
      while ($i < $num) {
        // incase there are two user_id which are the same letter wise but not case wise
        $nameInDB = mysql_result($result,$i,"user_id");
        $passInDB = mysql_result($result,$i,"passWord");
        $unitsViewable = mysql_result($result,$i,"units");
        if ( strcmp($userid,$nameInDB)==0 && strcmp($passWord,$passInDB)==0 ) {
        	$match = 1;
        	break;
        }
        $i++;
      }
      if ($match == 0) {
        echo "Invalid Login details <br> Please <a href=loginForm.html>go back</a> and try again";
      } else {
        session_start(); // start up PHP session! 
        session_register('userid');
        $_SESSION['user_id'] = $userid;
        $_SESSION['unitsViewable'] = $unitsViewable;
        echo "Welcome $userid!!<br><br>Please click <a href=secureMenu.php>here </a> to go to the main menu page...";
      }
    }
  } else {
    //user shouldn't be on this page without inputing a username and a password
    echo "here";
    //header( "http://127.0.0.1/thesis1/loginForm.html" ); 
  }
?>

Please help..

tauchai83 · April 3, 2007

don be worry. If your javascript do not work...you could do validation using php...

if( $password==''){

echo "plese enter your password!";

}

php_novice2007 · April 4, 2007

I fixed the javascript now I had "myform1.userid.value.length" whereas it should've been login.value.length instead..

I have a new question...

for my loginck.php, if I entered a correct user name and password and a session is started, I get a php warning.. what does this mean? Is my program only working because it is a fluke?

My warning is:

Warning: Unknown: Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively. in Unknown on line 0

The code for loginck.php is same as above.. I think its very weird how I can do

session_register('userid');

Shouldn't userid be $userid? It doesn't work when I put $userid. Also doesn't work if I put login..

what is php actually remembering?...

Thanks!

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