How to replace one or more variables from one php file to another?

Question

PHP

Hello, there is an index.php file on which the form is in the form "Login, Password, submit button". It is necessary that when you click on the "send" button, these data are overwritten in the account.php file, it looks like this:

<?php
$data= ['login' => 'Admin', 'password' => 'admin'];
?>

Who cares, tell me how to implement it)

Answer 1

It is correct to use a DB for such things.
This is how you can, God forgive me:

$content = '<?php' . PHP_EOL;
$content .= '$data= [\'login\' => \'' . $_POST['login'] . '\', \'password\' => \'' . $_POST['password'] . '\'];' . PHP_EOL;
$content .= '?>';

$fp = fopen('account.php','w');
fwrite($fp, $content);
fclose($fp);