whare Posted March 1, 2009 Share Posted March 1, 2009 Hi All Here we go with some session errors Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/www/dashairways.co.cc/index.php:1) in /home/www/dashairways.co.cc/include/session.php on line 46 sessions.php <?php /** * Session.php * * The Session class is meant to simplify the task of keeping * track of logged in users and also guests. * * Written by: Jpmaster77 a.k.a. The Grandmaster of C++ (GMC) * Last Updated: August 19, 2004 */ include("database.php"); include("mailer.php"); include("form.php"); class Session { var $username; //Username given on sign-up var $userid; //Random value generated on current login var $userlevel; //The level to which the user pertains var $time; //Time user was last active (page loaded) var $logged_in; //True if user is logged in, false otherwise var $userinfo = array(); //The array holding all user info var $url; //The page url current being viewed var $referrer; //Last recorded site page viewed /** * Note: referrer should really only be considered the actual * page referrer in process.php, any other time it may be * inaccurate. */ /* Class constructor */ function Session(){ $this->time = time(); $this->startSession(); } /** * startSession - Performs all the actions necessary to * initialize this session object. Tries to determine if the * the user has logged in already, and sets the variables * accordingly. Also takes advantage of this page load to * update the active visitors tables. */ function startSession(){ global $database; //The database connection session_start(); //Tell PHP to start the session /* Determine if user is logged in */ $this->logged_in = $this->checkLogin(); /** * Set guest value to users not logged in, and update * active guests table accordingly. */ if(!$this->logged_in){ $this->username = $_SESSION['username'] = GUEST_NAME; $this->userlevel = GUEST_LEVEL; $database->addActiveGuest($_SERVER['REMOTE_ADDR'], $this->time); } /* Update users last active timestamp */ else{ $database->addActiveUser($this->username, $this->time); } /* Remove inactive visitors from database */ $database->removeInactiveUsers(); $database->removeInactiveGuests(); /* Set referrer page */ if(isset($_SESSION['url'])){ $this->referrer = $_SESSION['url']; }else{ $this->referrer = "/"; } /* Set current url */ $this->url = $_SESSION['url'] = $_SERVER['PHP_SELF']; } /** * checkLogin - Checks if the user has already previously * logged in, and a session with the user has already been * established. Also checks to see if user has been remembered. * If so, the database is queried to make sure of the user's * authenticity. Returns true if the user has logged in. */ function checkLogin(){ global $database; //The database connection /* Check if user has been remembered */ if(isset($_COOKIE['cookname']) && isset($_COOKIE['cookid'])){ $this->username = $_SESSION['username'] = $_COOKIE['cookname']; $this->userid = $_SESSION['userid'] = $_COOKIE['cookid']; } /* Username and userid have been set and not guest */ if(isset($_SESSION['username']) && isset($_SESSION['userid']) && $_SESSION['username'] != GUEST_NAME){ /* Confirm that username and userid are valid */ if($database->confirmUserID($_SESSION['username'], $_SESSION['userid']) != 0){ /* Variables are incorrect, user not logged in */ unset($_SESSION['username']); unset($_SESSION['userid']); return false; } /* User is logged in, set class variables */ $this->userinfo = $database->getUserInfo($_SESSION['username']); $this->username = $this->userinfo['username']; $this->userid = $this->userinfo['userid']; $this->userlevel = $this->userinfo['userlevel']; return true; } /* User not logged in */ else{ return false; } } /** * login - The user has submitted his username and password * through the login form, this function checks the authenticity * of that information in the database and creates the session. * Effectively logging in the user if all goes well. */ function login($subuser, $subpass, $subremember){ global $database, $form; //The database and form object /* Username error checking */ $field = "user"; //Use field name for username if(!$subuser || strlen($subuser = trim($subuser)) == 0){ $form->setError($field, "* Username not entered"); } else{ /* Check if username is not alphanumeric */ if(!eregi("^([0-9a-z])*$", $subuser)){ $form->setError($field, "* Username not alphanumeric"); } } /* Password error checking */ $field = "pass"; //Use field name for password if(!$subpass){ $form->setError($field, "* Password not entered"); } /* Return if form errors exist */ if($form->num_errors > 0){ return false; } /* Checks that username is in database and password is correct */ $subuser = stripslashes($subuser); $result = $database->confirmUserPass($subuser, md5($subpass)); /* Check error codes */ if($result == 1){ $field = "user"; $form->setError($field, "* Username not found"); } else if($result == 2){ $field = "pass"; $form->setError($field, "* Invalid password"); } /* Return if form errors exist */ if($form->num_errors > 0){ return false; } /* Username and password correct, register session variables */ $this->userinfo = $database->getUserInfo($subuser); $this->username = $_SESSION['username'] = $this->userinfo['username']; $this->userid = $_SESSION['userid'] = $this->generateRandID(); $this->userlevel = $this->userinfo['userlevel']; /* Insert userid into database and update active users table */ $database->updateUserField($this->username, "userid", $this->userid); $database->addActiveUser($this->username, $this->time); $database->removeActiveGuest($_SERVER['REMOTE_ADDR']); /** * This is the cool part: the user has requested that we remember that * he's logged in, so we set two cookies. One to hold his username, * and one to hold his random value userid. It expires by the time * specified in constants.php. Now, next time he comes to our site, we will * log him in automatically, but only if he didn't log out before he left. */ if($subremember){ setcookie("cookname", $this->username, time()+COOKIE_EXPIRE, COOKIE_PATH); setcookie("cookid", $this->userid, time()+COOKIE_EXPIRE, COOKIE_PATH); } /* Login completed successfully */ return true; } /** * logout - Gets called when the user wants to be logged out of the * website. It deletes any cookies that were stored on the users * computer as a result of him wanting to be remembered, and also * unsets session variables and demotes his user level to guest. */ function logout(){ global $database; //The database connection /** * Delete cookies - the time must be in the past, * so just negate what you added when creating the * cookie. */ if(isset($_COOKIE['cookname']) && isset($_COOKIE['cookid'])){ setcookie("cookname", "", time()-COOKIE_EXPIRE, COOKIE_PATH); setcookie("cookid", "", time()-COOKIE_EXPIRE, COOKIE_PATH); } /* Unset PHP session variables */ unset($_SESSION['username']); unset($_SESSION['userid']); /* Reflect fact that user has logged out */ $this->logged_in = false; /** * Remove from active users table and add to * active guests tables. */ $database->removeActiveUser($this->username); $database->addActiveGuest($_SERVER['REMOTE_ADDR'], $this->time); /* Set user level to guest */ $this->username = GUEST_NAME; $this->userlevel = GUEST_LEVEL; } /** * register - Gets called when the user has just submitted the * registration form. Determines if there were any errors with * the entry fields, if so, it records the errors and returns * 1. If no errors were found, it registers the new user and * returns 0. Returns 2 if registration failed. */ function register($subuser, $subpass, $subemail){ global $database, $form, $mailer; //The database, form and mailer object /* Username error checking */ $field = "user"; //Use field name for username if(!$subuser || strlen($subuser = trim($subuser)) == 0){ $form->setError($field, "* Username not entered"); } else{ /* Spruce up username, check length */ $subuser = stripslashes($subuser); if(strlen($subuser) < 5){ $form->setError($field, "* Username below 5 characters"); } else if(strlen($subuser) > 30){ $form->setError($field, "* Username above 30 characters"); } /* Check if username is not alphanumeric */ else if(!eregi("^([0-9a-z])+$", $subuser)){ $form->setError($field, "* Username not alphanumeric"); } /* Check if username is reserved */ else if(strcasecmp($subuser, GUEST_NAME) == 0){ $form->setError($field, "* Username reserved word"); } /* Check if username is already in use */ else if($database->usernameTaken($subuser)){ $form->setError($field, "* Username already in use"); } /* Check if username is banned */ else if($database->usernameBanned($subuser)){ $form->setError($field, "* Username banned"); } } /* Password error checking */ $field = "pass"; //Use field name for password if(!$subpass){ $form->setError($field, "* Password not entered"); } else{ /* Spruce up password and check length*/ $subpass = stripslashes($subpass); if(strlen($subpass) < 4){ $form->setError($field, "* Password too short"); } /* Check if password is not alphanumeric */ else if(!eregi("^([0-9a-z])+$", ($subpass = trim($subpass)))){ $form->setError($field, "* Password not alphanumeric"); } /** * Note: I trimmed the password only after I checked the length * because if you fill the password field up with spaces * it looks like a lot more characters than 4, so it looks * kind of stupid to report "password too short". */ } /* Email error checking */ $field = "email"; //Use field name for email if(!$subemail || strlen($subemail = trim($subemail)) == 0){ $form->setError($field, "* Email not entered"); } else{ /* Check if valid email address */ $regex = "^[_+a-z0-9-]+(\.[_+a-z0-9-]+)*" ."@[a-z0-9-]+(\.[a-z0-9-]{1,})*" ."\.([a-z]{2,}){1}$"; if(!eregi($regex,$subemail)){ $form->setError($field, "* Email invalid"); } $subemail = stripslashes($subemail); } /* Errors exist, have user correct them */ if($form->num_errors > 0){ return 1; //Errors with form } /* No errors, add the new account to the */ else{ if($database->addNewUser($subuser, md5($subpass), $subemail)){ if(EMAIL_WELCOME){ $mailer->sendWelcome($subuser,$subemail,$subpass); } return 0; //New user added succesfully }else{ return 2; //Registration attempt failed } } } /** * editAccount - Attempts to edit the user's account information * including the password, which it first makes sure is correct * if entered, if so and the new password is in the right * format, the change is made. All other fields are changed * automatically. */ function editAccount($subcurpass, $subnewpass, $subemail){ global $database, $form; //The database and form object /* New password entered */ if($subnewpass){ /* Current Password error checking */ $field = "curpass"; //Use field name for current password if(!$subcurpass){ $form->setError($field, "* Current Password not entered"); } else{ /* Check if password too short or is not alphanumeric */ $subcurpass = stripslashes($subcurpass); if(strlen($subcurpass) < 4 || !eregi("^([0-9a-z])+$", ($subcurpass = trim($subcurpass)))){ $form->setError($field, "* Current Password incorrect"); } /* Password entered is incorrect */ if($database->confirmUserPass($this->username,md5($subcurpass)) != 0){ $form->setError($field, "* Current Password incorrect"); } } /* New Password error checking */ $field = "newpass"; //Use field name for new password /* Spruce up password and check length*/ $subpass = stripslashes($subnewpass); if(strlen($subnewpass) < 4){ $form->setError($field, "* New Password too short"); } /* Check if password is not alphanumeric */ else if(!eregi("^([0-9a-z])+$", ($subnewpass = trim($subnewpass)))){ $form->setError($field, "* New Password not alphanumeric"); } } /* Change password attempted */ else if($subcurpass){ /* New Password error reporting */ $field = "newpass"; //Use field name for new password $form->setError($field, "* New Password not entered"); } /* Email error checking */ $field = "email"; //Use field name for email if($subemail && strlen($subemail = trim($subemail)) > 0){ /* Check if valid email address */ $regex = "^[_+a-z0-9-]+(\.[_+a-z0-9-]+)*" ."@[a-z0-9-]+(\.[a-z0-9-]{1,})*" ."\.([a-z]{2,}){1}$"; if(!eregi($regex,$subemail)){ $form->setError($field, "* Email invalid"); } $subemail = stripslashes($subemail); } /* Errors exist, have user correct them */ if($form->num_errors > 0){ return false; //Errors with form } /* Update password since there were no errors */ if($subcurpass && $subnewpass){ $database->updateUserField($this->username,"password",md5($subnewpass)); } /* Change Email */ if($subemail){ $database->updateUserField($this->username,"email",$subemail); } /* Success! */ return true; } /** * isAdmin - Returns true if currently logged in user is * an administrator, false otherwise. */ function isAdmin(){ return ($this->userlevel == ADMIN_LEVEL || $this->username == ADMIN_NAME); } /** * generateRandID - Generates a string made up of randomized * letters (lower and upper case) and digits and returns * the md5 hash of it to be used as a userid. */ function generateRandID(){ return md5($this->generateRandStr(16)); } /** * generateRandStr - Generates a string made up of randomized * letters (lower and upper case) and digits, the length * is a specified parameter. */ function generateRandStr($length){ $randstr = ""; for($i=0; $i<$length; $i++){ $randnum = mt_rand(0,61); if($randnum < 10){ $randstr .= chr($randnum+48); }else if($randnum < 36){ $randstr .= chr($randnum+55); }else{ $randstr .= chr($randnum+61); } } return $randstr; } }; /** * Initialize session object - This must be initialized before * the form object because the form uses session variables, * which cannot be accessed unless the session has started. */ $session = new Session; /* Initialize form object */ $form = new Form; ?> main.php (now this works fine) <?php /** * Main.php * * This is an example of the main page of a website. Here * users will be able to login. However, like on most sites * the login form doesn't just have to be on the main page, * but re-appear on subsequent pages, depending on whether * the user has logged in or not. * * Written by: Jpmaster77 a.k.a. The Grandmaster of C++ (GMC) * Last Updated: August 26, 2004 */ include("include/session.php"); ?> <html> <body> <table> <tr><td> <?php /** * User has already logged in, so display relavent links, including * a link to the admin center if the user is an administrator. */ if($session->logged_in){ echo "<h1>Logged In</h1>"; echo "Welcome <b>$session->username</b>, you are logged in. <br><br>" ."[<a href=\"userinfo.php?user=$session->username\">My Account</a>] " ."[<a href=\"useredit.php\">Edit Account</a>] "; if($session->isAdmin()){ echo "[<a href=\"admin/admin.php\">Admin Center</a>] "; } echo "[<a href=\"process.php\">Logout</a>]"; } else{ ?> <h1>Login</h1> <?php /** * User not logged in, display the login form. * If user has already tried to login, but errors were * found, display the total number of errors. * If errors occurred, they will be displayed. */ if($form->num_errors > 0){ echo "<font size=\"2\" color=\"#ff0000\">".$form->num_errors." error(s) found</font>"; } ?> <form action="process.php" method="POST"> <table align="left" border="0" cellspacing="0" cellpadding="3"> <tr><td>Username:</td><td><input type="text" name="user" maxlength="30" value="<? echo $form->value("user"); ?>"></td><td><? echo $form->error("user"); ?></td></tr> <tr><td>Password:</td><td><input type="password" name="pass" maxlength="30" value="<? echo $form->value("pass"); ?>"></td><td><? echo $form->error("pass"); ?></td></tr> <tr><td colspan="2" align="left"><input type="checkbox" name="remember" <? if($form->value("remember") != ""){ echo "checked"; } ?>> <font size="2">Remember me next time <input type="hidden" name="sublogin" value="1"> <input type="submit" value="Login"></td></tr> <tr><td colspan="2" align="left"><br><font size="2">[<a href="forgotpass.php">Forgot Password?</a>]</font></td><td align="right"></td></tr> <tr><td colspan="2" align="left"><br>Not registered? <a href="register.php">Sign-Up!</a></td></tr> </table> </form> <?php } /** * Just a little page footer, tells how many registered members * there are, how many users currently logged in and viewing site, * and how many guests viewing site. Active users are displayed, * with link to their user information. */ echo "</td></tr><tr><td align=\"center\"><br><br>"; echo "<b>Member Total:</b> ".$database->getNumMembers()."<br>"; echo "There are $database->num_active_users registered members and "; echo "$database->num_active_guests guests viewing the site.<br><br>"; include("include/view_active.php"); ?> </td></tr> </table> </body> </html> My index.php I have taken snipplets from main.php to put this together there is some linking errors in there but nothing to worry about I will sort them when I sort the session problem <?php include("include/session.php"); include('config/img.php'); ?> <html> <head> <link rel="stylesheet" type="text/css" href="config/style.css" /> <title>Dash Airways</title> </head> <body> <table class="main" align="center"> <tr> <td colspan="3" class="head"><img src="img/header.png"></td> </tr> <tr> <td class="leftmenu" valign="top"><br /> <table class="menu"> <tr> <th class="mhead">Main Menu</th> </tr> <tr> <td class="min"><br /> <a href="?page=home">Home</a><br /> About<br /> Join<br /> Contact<br /> Forum<br /><br /></td> </tr> </table><br /><br /> <table class="menu"> <tr> <th class="mhead">Advertisment</th> </tr> <tr> <td class="min"><br />Check Back Later<br />There might be some then<br /><br /> </tr> </table><br /> </td> <td class="body" valign="top"> <?php $page = $_GET['page']; if (!empty($page)) { $page .= '.php'; include($page); } else { include('home.php'); } ?></td> <td class="rightmenu" valign="top"><br /> <table class="menu1"> <tr> <th class="mhead">Airline Info</th> </tr> <tr> <td class="min"><br /><?php echo "<b>Member Total:</b> ".$database->getNumMembers()."<br>"; echo "There are $database->num_active_users registered members and "; echo "$database->num_active_guests guests viewing the site.<br><br>"; include("include/view_active.php"); ?> </td> </tr> </table><br /><br /> <table class="menu1"> <tr> <th class="mhead">Login</th> </tr> <tr> <td class="min"><br /><?php /** * User has already logged in, so display relavent links, including * a link to the admin center if the user is an administrator. */ if($session->logged_in){ echo "<h1>Logged In</h1>"; echo "Welcome <b>$session->username</b>, you are logged in. <br><br>" ."[<a href=\"userinfo.php?user=$session->username\">My Account</a>] " ."[<a href=\"useredit.php\">Edit Account</a>] "; if($session->isAdmin()){ echo "[<a href=\"admin/admin.php\">Admin Center</a>] "; } echo "[<a href=\"process.php\">Logout</a>]"; } else{ ?> <h1>Login</h1> <?php /** * User not logged in, display the login form. * If user has already tried to login, but errors were * found, display the total number of errors. * If errors occurred, they will be displayed. */ if($form->num_errors > 0){ echo "<font size=\"2\" color=\"#ff0000\">".$form->num_errors." error(s) found</font>"; } ?> <table align="left" border="0" cellspacing="0" cellpadding="3"> <form action="process.php" method="POST"> <tr><td>Username:</td><td><input type="text" name="user" maxlength="30" value="<? echo $form->value("user"); ?>"></td><td><? echo $form->error("user"); ?></td></tr> <tr><td>Password:</td><td><input type="password" name="pass" maxlength="30" value="<? echo $form->value("pass"); ?>"></td><td><? echo $form->error("pass"); ?></td></tr> <tr><td colspan="2" align="left"><input type="checkbox" name="remember" <? if($form->value("remember") != ""){ echo "checked"; } ?>> <font size="2">Remember me next time <input type="hidden" name="sublogin" value="1"> <input type="submit" value="Login"></td></tr> <tr><td colspan="2" align="left"><br><font size="2">[<a href="forgotpass.php">Forgot Password?</a>]</font></td><td align="right"></td></tr> <tr><td colspan="2" align="left"><br>Not registered? <a href="register.php">Sign-Up!</a></td></tr> </form> </table> <? } ?> </td> </tr> </table><br /></td> </tr> <tr> <td colspan="3" class="foot">©Copyright 2002-2009 Dash Airways<br /> Website and Graphics created by William Evans<br /> This site is best viewed using Modzilla Firefox 3 with a minimum resolution of 800x600</td> </tr> </table> </body> </html> to view the error in action please goto http://temp.sc40.info/ (please ignore the formatting it is still WIP lol) Thanx Will Link to comment https://forums.phpfreaks.com/topic/147474-solved-session_start-error/ Share on other sites More sharing options...
corbin Posted March 1, 2009 Share Posted March 1, 2009 http://www.phpfreaks.com/forums/index.php/topic,37442.0.html Link to comment https://forums.phpfreaks.com/topic/147474-solved-session_start-error/#findComment-774085 Share on other sites More sharing options...
whare Posted March 1, 2009 Author Share Posted March 1, 2009 I did not see that topic (I was not looking for it) White space was the problem Sorry for posting this and thanx Will Link to comment https://forums.phpfreaks.com/topic/147474-solved-session_start-error/#findComment-774122 Share on other sites More sharing options...
corbin Posted March 1, 2009 Share Posted March 1, 2009 No problem ;p. Link to comment https://forums.phpfreaks.com/topic/147474-solved-session_start-error/#findComment-774128 Share on other sites More sharing options...
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