PHP - formularios segun la cantidad que introduzca

<form method="post">

   <input type="text" name="Numero"/>

   <input type="submit"/>

<form><br/>

<?

if(isset($_POST[Numero])){

   echo "<form>";

   for($i=1; $i<=$_POST[Numero]; $i++){

      echo "<label>$i Nombre: </label><input type'text' name='Nombre_$i'/><br/>";

   }

   echo "<input type='submit'/></form>";

}

?>

<form method="post">

   <input type="text" name="Numero"/>

   <input type="submit"/><br/>

<form><br/>

<?php

$variable1="";

$variable2="";

$variable3="";

$variable4="";

if(isset($_POST['Numero'])){

   echo "<form method='post'>";

   for($i=1; $i<=$_POST['Numero']; $i++)

   {

      echo "<label>$i Dia: </label><input type'text' name='hola_$i'/><br/>";

   }

   echo "<input type='submit' name='submit2'/></form>";

}

if (isset($_POST['submit2'])){

$variable1= $_POST['hola_1'];

$variable2= $_POST['hola_2'];

$variable3= $_POST['hola_3'];

$variable4= $_POST['hola_4'];

	echo $variable1."<br/>";

	echo $variable2."<br/>";

	echo $variable3."<br/>";

	echo $variable4."<br/>";

}

?>