PHP

How to check if email exists in laravel login

$validator = Validator::make($request->all(), [
        'email' => 'required|exists:users',
        'password' => 'required|string'
    ]);

    if ($validator->fails()) {
        flash('Email Does Not Exists')->error();
        
        // or 

        $request->session()->flash('message', 'Email Does Not Exists');
    }

laravel check if email is real

<?php
$email = "john.doe@example.com";

if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
  echo("$email is a valid email address");
} else {
  echo("$email is not a valid email address");
}
?>