php - Register and Login Multiple Users With the Same Firstname and Lastname -


i'm working on register-login system, i'm facing following problem: - can have 2 (or more) employees same firstname , same lastname, , possibly same password, each located either in same location, or different. when i'm trying register them, obviously, there aren't problems, when want login them, problems arise.

users table:

id int (11) a_i p_k, firstname varchar (50), lastname varchar(50), password varchar(150)

register.php

<?php $db = new pdo('mysql:host=127.0.0.1;dbname=xxx', 'root', '');  $fname = isset($_post['fname]) ? $_post['fname'] : ''; $lname = isset($_post['lname']) ? $_post['lname'] : ''; $pass  = isset($_post['pass']) ? password_hash($_post['pass'], password_default) : '';  $stmt = $db->prepare('insert users set fname=?,lname=?,pass=?'); $stmt->execute([$fname,$lname,$pass]); ?> <form method="post">     <input type="text" name="fname"/><br/>     <input type="text" name="lname"/><br/>     <input type="password" name="pass"/><br/>     <input type="submit" value="register"/> </form>

let's following users register:

fname=aaa lname=bbb pass=123456 // password_hash(123456) = hash1 fname=aaa lname=bbb pass=123456 // password_hash(123456) = hash2

login.php

<?php $db = new pdo('mysql:host=127.0.0.1;dbname=xxx', 'root', '');  $fname = isset($_post['fname]) ? $_post['fname'] : ''; $lname = isset($_post['lname']) ? $_post['lname'] : ''; $pass  = isset($_post['pass']) ? $_post['pass'] : '';  $stmt = $db->prepare('select * users fname=? , lname=?'); $stmt->execute([$fname,$lname]); while ($row = $stmt->fetch(pdo::fetch_obj)){     if (password_verify($pass, $row->pass)) {         echo $row->fname,' ',$row->lname,'<br/>',$row->pass,"<br/>";         // header('location: app.php');     } } ?> <form method="post">     <input type="text" name="fname"/><br/>     <input type="text" name="lname"/><br/>     <input type="password" name="pass"/><br/>     <input type="submit" value="login"/> </form>

if run login.php script, following output:

aaa bbb $2y$10$onkd3s06bououyeh0/i9be4jry1g8uixgb3lxwrobzfzzywhka6eq (== hash1)  aaa bbb $2y$10$ss0n1ibypn4lg2vlp90yc.vh109y1lq54x0bi/tgs242hn/vkgwvi (== hash2)

and question is, how can differentiate 2 users, can log in in app.php page, must display credentials , other personal infos, differs 1 user another? thanks!

le: if try limit 1 login query, display first record found in db.

if users have same firstname, same lastname , same password, can't decide user database correct. need give them 1 unique part. maybe loginname or emailaddress


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