I have a task to make a login system using php, specifically one that hashes passwords into a .txt file (which is not the way you want) I have tried this but can't figure out how to even start . I was told to use the function file() to create an array. Any kind of help would be greatly appreciated
Currently we have this
<!DOCTYPE html>
<html lang="en">
<body>
<form action="test.php" method="post">
<span>Username</span>
<input type="text" name="Username" id="Login-Input-Username" required><br>
<span>Password</span>
<input type="password" name="Password" id="Login-Input-Password" required>
<button type="submit" name="Submit-Button" value="submit" id="Login-
Button">Sign In</button>
</form>
<?php
if(isset($_POST['Submit-Button']))
{
$username = $_POST['Username'];
$password = $_POST['Password'];
$hash = password_hash($password, PASSWORD_DEFAULT);
$fileRows = file("accounts.txt", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
}?> 
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I don't really know why you want to store the data in a file, but you can rewrite your PHP code like below
$username, 'password' => $hash, ]; $fileRows = file_put_contents('accounts.txt', json_encode($data).PHP_EOL , FILE_APPEND | LOCK_EX); }?>