Is it possible to call the php file from itself?

To be honest I'm looking for the return "unnecessarily", but I'm curious, I'm just starting with php and searched but I could not find it.

I use the interpreter to execute a small php that I did and the idea would be to execute itself instead of using a loop (since we still "did not see that").

I put a simple code that would represent what I want to do:

numero.php

<?php
  echo "Ingrese un número de 1 a 10: ";
  $numero = trim(fgets(STDIN));
  if($numero < 1 || $numero > 10) {
    echo "Número incorrecto, ¿prueba otra vez? (S/N): ";
    $respuesta = strtoupper(trim(fgets(STDIN)));
    if($respuesta == "S") {

      llamar numero.php

    }
  }
  echo "\n";
?>

I tried using shell_exec (), it does not give an error, but it does not answer anything anymore.

Just in case, if it makes any difference, I'm using Linux.

Eduardo's suggestion:

<?php

  include("./numero.php");

  echo "Ingrese un número de 1 a 10: ";
  $numero = trim(fgets(STDIN));
  if($numero < 1 || $numero > 10) {
    echo "Número incorrecto, ¿prueba otra vez? (S/N): ";
    $respuesta = strtoupper(trim(fgets(STDIN)));
    if($respuesta == "S") {
        numero();
    }
  }
  echo "\n";
?>

When you run it with php numero.php it does nothing, having to finish the execution with CTRL + C

And using header("Location: numero.php"); as Eduardo suggested, I would not know how to execute numero.php from if($respuesta == "S")