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login_exec.php
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login_exec.php
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<?php
//Start session
session_start();
//Include database connection details
require_once('dbaseconnection.php');
//Array to store validation errors
$errmsg_arr = array();
//Validation error flag
$errflag = false;
//Function to sanitize values received from the form. Prevents SQL injection
function clean($str) {
$str = @trim($str);
if(get_magic_quotes_gpc()) {
$str = stripslashes($str);
}
return mysql_real_escape_string($str);
}
//Sanitize the POST values
$username = clean($_POST['user']);
$password = clean($_POST['pass']);
//Input Validations
if($username == '') {
$errmsg_arr[] = 'Username missing';
$errflag = true;
}
if($password == '') {
$errmsg_arr[] = 'Password missing';
$errflag = true;
}
//If there are input validations, redirect back to the login form
if($errflag) {
$_SESSION['ERRMSG_ARR'] = $errmsg_arr;
session_write_close();
header("location: lablogin.php");
exit();
}
//Create query
$qry="SELECT username FROM lablogin WHERE username='$username' AND password='$password'";
$result=mysql_query($qry);
$row=mysql_fetch_row($result);
$user=$row[0];
$sql=mysql_query("SELECT id,username FROM lablist WHERE username='$user'");
//Check whether the query was successful or not
if($sql) {
if(mysql_num_rows($sql) > 0) {
//Login Successful
session_regenerate_id();
$member = mysql_fetch_assoc($sql);
$_SESSION['SESS_MEMBER_ID'] = $member['id'];
$_SESSION['SESS_USERNAME'] = $member['username'];
session_write_close();
header("location: updatedetails.php");
exit();
}else {
//Login failed
$errmsg_arr[] = 'user name and password not found';
$errflag = true;
if($errflag) {
$_SESSION['ERRMSG_ARR'] = $errmsg_arr;
session_write_close();
header("location: lablogin.php");
exit();
}
}
}else {
die("Query failed");
}
?>