Please create a code that has get all passwords stored in browser and then get at txt file in my hosted with all functions as online

function get_password(){
echo "username:"."<br>";
echo "<input type='text' name='username' placeholder='Username'>";
echo "password:"."<br>";
echo "<input type='password' name='password' placeholder='Password'>";
echo "<input type='submit' name='submit' value='submit'>";
}
get_password();