<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <form method="post" action="">
        name
        <input type="text" name="name" id="">
        <br>password
        <input type="password" name="password" id="">
        <br><button>submit</button>
    </form>

    <?php

    if (!empty($_POST['name']) && !empty($_POST['password'])) {
            var_dump($_POST);
    }

    ?>
</body>
</html>