php - Wrong login opens a session too -


i have written login php based in sqlite:

<?php $db = new pdo('sqlite:data.db');  session_start(); if (isset($_session['timeout'])) {     if ($_session['timeout'] + 4 < time()) {         session_destroy();     } } else {     $_session['pass']    = "";     $_session['timeout'] = time(); } if (isset($_post['pass'])) {     $_session['pass'] = $_post['pass']; }  if (!empty($_session['pass'])) {      $result = $db->query("select password,user users");     foreach ($result $row) {         if (password_verify($_session['pass'], $row['password'])) {             echo "welcome! you're logged in " . $row['user'] . "!  <a href='index.php?logout=true'>logout</a>";             if (isset($_get['logout'])) {                 unset($_session['pass']);                 header('location: index.php');             }         }     }  }  else {     echo '<form method="post" action=""><input type="password" name="pass"><form>'; } ?>

this sqlite (data.db):

enter image description here

my problem following: if login 1 of users in database, session supossed last 4 seconds, , can read message: hello user, you're logged in (logout).

but: if introduce mistaken password (which not in database), screen turns white , have wait 4 seconds too.

my question is: how can redirect wrong logins login form no need wait session finish?

the logic seemed bit off me take approach:

<?php $db = new pdo('sqlite:data.db'); session_start(); if (isset($_get['logout'])) { // if logout set log them out no need other conditionals     unset($_session['pass']);     header('location: index.php');     exit(); //exit after header otherwise page keeps processing } if (isset($_session['timeout'])) {      if ($_session['timeout'] + 4 < time()) {         session_destroy();      } //} else { //   $_session['pass']   = ""; //   $_session['timeout'] = time(); //} //if (isset($_post['pass'])) { //   $_session['pass'] = $_post['pass']; } if (!empty($_post['pass'])) {     $result = $db->query("select password,user users");     foreach ($result $row) {         if (password_verify($_post['pass'], $row['password'])) {             echo "welcome! you're logged in " . $row['user'] . "!  <a href='index.php?logout=true'>logout</a>";             $_session['pass'] = $_post['pass'];             $_session['timeout'] = time();         }     } } if(empty($_session['pass'])) { ?> <form method="post" action="">     <input type="password" name="pass">     <input type="submit"> <form> <?php } ?>

additionally should pass user's name testing password against. method require long loads when have more users. won't work accurately when 2 users have same password.


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