Código HTML:
<?php if(isset($_POST['noticia'])) { $num1 = $_POST['num1']; $num2 = $_POST['num2']; $numres = $num1 + $num2; mysql_connect("localhost","root") or die ("no se pudo conectar"); mysql_select_db("prueba"); mysql_query("UPDATE numero SET sumatoria = sumatoria + 1"); mysql_query("INSERT INTO numero (num1, num2, resultado) VALUES ('$num1', '$num2', '$numres')"); $query2 = mysql_query("SELECT * FROM numero"); while ($row = mysql_fetch_array($query2)) { $sumador = $row['sumatoria']; } $query = mysql_query("SELECT * FROM numero WHERE id=$sumador"); while ($res = mysql_fetch_array($query)) { $num1_b = $res['num1']; $num2_b = $res['num2']; $numres_b = $res['resultado']; } } ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Documento sin título</title> </head> <body> <form id="form1" name="form1" method="post" action=""> <p> <label> <input type="text" name="num1" id="num1" /> </label> + <label> <input type="text" name="num2" id="num2" /> </label> <input type="submit" name="noticia" id="noticia" value="Enviar" /></p> <p>Resultado actual: <?php if(isset($_POST['noticia'])) { echo $numres; } ?> </p> <p>Operadores Anteriores: <?php if(isset($_POST['noticia'])) { echo $res['num1']; } ?> + <?php if(isset($_POST['noticia'])) { echo $res['num2']; } ?></p> <p> Resultado anterior: <?php if(isset($_POST['noticia'])) { echo $res['resultado']; }?></p> <label></label> </form> </body> </html>