Le agrego un
Código PHP:
<?php
session_start();
/*Verificamos si $_SESSION es Igual al username*/
if(isset($_SESSION['username'])) {
}else{
header ("Location: IniciarSecion.php");
}
?>
incluyo este restrigida.php por que es segun yo para que cheque la sesión y no me salten a esta pagina pero cuando cambio o actualizo algún campo me sale este error:
Warning: Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/SliderPhp/Connections/conexiontopstetik.php:15) in /Applications/XAMPP/xamppfiles/htdocs/SliderPhp/Slider_editar.php on line 59
Y veo ke es en la linea es esta -------> header(sprintf("Location: %s", $updateGoTo));
Código PHP:
<?php
require_once('restringida.php');
?>
<?php require_once('Connections/conexiontopstetik.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
if (PHP_VERSION < 6) {
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
}
$theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
$editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}
if ((isset($_POST["MM_update"])) && ($_POST["MM_update"] == "form1")) {
$updateSQL = sprintf("UPDATE tblslider SET strImagenGrande=%s, strImagenPequena=%s, strTitulo=%s, strSubtitulo=%s, strMenu=%s, strLink=%s, intOrden=%s, intEstado=%s WHERE idContador=%s",
GetSQLValueString($_POST['strImagenGrande'], "text"),
GetSQLValueString($_POST['strImagenPequena'], "text"),
GetSQLValueString($_POST['strTitulo'], "text"),
GetSQLValueString($_POST['strSubtitulo'], "text"),
GetSQLValueString($_POST['strMenu'], "text"),
GetSQLValueString($_POST['strLink'], "text"),
GetSQLValueString($_POST['intOrden'], "int"),
GetSQLValueString($_POST['intEstado'], "int"),
GetSQLValueString($_POST['idContador'], "int"));
mysql_select_db($database_conexiontopstetik, $conexiontopstetik);
$Result1 = mysql_query($updateSQL, $conexiontopstetik) or die(mysql_error());
$updateGoTo = "Slider_Lista.php";
if (isset($_SERVER['QUERY_STRING'])) {
$updateGoTo .= (strpos($updateGoTo, '?')) ? "&" : "?";
$updateGoTo .= $_SERVER['QUERY_STRING'];
}
header(sprintf("Location: %s", $updateGoTo));
}
$varDato_DatosSlider = "0";
if (isset($_GET["recordID"])) {
$varDato_DatosSlider = $_GET["recordID"];
}
mysql_select_db($database_conexiontopstetik, $conexiontopstetik);
$query_DatosSlider = sprintf("SELECT * FROM tblslider WHERE tblslider.idContador=%s", GetSQLValueString($varDato_DatosSlider, "int"));
$DatosSlider = mysql_query($query_DatosSlider, $conexiontopstetik) or die(mysql_error());
$row_DatosSlider = mysql_fetch_assoc($DatosSlider);
$totalRows_DatosSlider = mysql_num_rows($DatosSlider);
?>
<!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"><!-- InstanceBegin template="/Templates/PlantillaAdmin.dwt.php" codeOutsideHTMLIsLocked="false" -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link href="Css/admin.css" rel="stylesheet" type="text/css" />
<!-- InstanceBeginEditable name="doctitle" -->
<title>Bienvenido Administrador</title>
<!-- InstanceEndEditable -->
<!-- InstanceBeginEditable name="head" -->
<!-- InstanceEndEditable -->
</head>
<body>
<div class="container">
<div class="header"><img src="Imagenes/Logo.png" width="900" height="100"/>
<!-- end .header --></div>
<div class="sidebar1">
<?php include ("Menu_Izq.php");?>
</ul>
<!-- end .sidebar1 --></div>
<div class="content">
<!-- InstanceBeginEditable name="ParteDerechaAdmin" -->
<script>
function subirimagen(nombrecampo)
{
self.name = 'opener';
remote = open('gestionimagen.php?campo='+nombrecampo, 'remote', 'width=618, height=246,location=no,scrollbar=yes,menubars=no,toolbars=no,resizable=yes,fullscreen=no, status=yes');
remote.focus();
}
</script>
<h1>Editar Imagen</h1>
<p> </p>
<form action="<?php echo $editFormAction; ?>" method="post" name="form1" id="form1">
<table align="center">
<tr valign="baseline">
<td nowrap="nowrap" align="right">ImagenGrande(618x246px):</td>
<td><input type="text" name="strImagenGrande" value="<?php echo htmlentities($row_DatosSlider['strImagenGrande'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /><input type="button" name="button" id="button" value="Subir Imagen" onclick="javascript:subirimagen('strImagenGrande');"/></td>
</tr>
<tr valign="baseline">
<td nowrap="nowrap" align="right">ImagenPequena(80x50px):</td>
<td><input type="text" name="strImagenPequena" value="<?php echo htmlentities($row_DatosSlider['strImagenPequena'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /><input type="button" name="button" id="button" value="Subir Imagen" onclick="javascript:subirimagen('strImagenPequena');"/></td>
</tr>
<tr valign="baseline">
<td nowrap="nowrap" align="right">Titulo:</td>
<td><input type="text" name="strTitulo" value="<?php echo htmlentities($row_DatosSlider['strTitulo'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /></td>
</tr>
<tr valign="baseline">
<td nowrap="nowrap" align="right">Subtitulo:</td>
<td><input type="text" name="strSubtitulo" value="<?php echo htmlentities($row_DatosSlider['strSubtitulo'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /></td>
</tr>
<tr valign="baseline">
<td nowrap="nowrap" align="right">Menu:</td>
<td><input type="text" name="strMenu" value="<?php echo htmlentities($row_DatosSlider['strMenu'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /></td>
</tr>
<tr valign="baseline">
<td nowrap="nowrap" align="right">Link:</td>
<td><input type="text" name="strLink" value="<?php echo htmlentities($row_DatosSlider['strLink'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /></td>
</tr>
<tr valign="baseline">
<td nowrap="nowrap" align="right">Orden:</td>
<td><input type="text" name="intOrden" value="<?php echo htmlentities($row_DatosSlider['intOrden'], ENT_COMPAT, 'UTF-8'); ?>" size="5" /></td>
</tr>
<tr valign="baseline">
<td nowrap="nowrap" align="right">Estado:</td>
<td><select name="intEstado">
<option value="1" <?php if (!(strcmp(1, htmlentities($row_DatosSlider['intEstado'], ENT_COMPAT, 'UTF-8')))) {echo "SELECTED";} ?>>Activo</option>
<option value="0" <?php if (!(strcmp(0, htmlentities($row_DatosSlider['intEstado'], ENT_COMPAT, 'UTF-8')))) {echo "SELECTED";} ?>>Desactivado</option>
</select></td>
</tr>
<tr valign="baseline">
<td nowrap="nowrap" align="right"> </td>
<td><input type="submit" value="Actualizar registro" /></td>
</tr>
</table>
<input type="hidden" name="MM_update" value="form1" />
<input type="hidden" name="idContador" value="<?php echo $row_DatosSlider['idContador']; ?>" />
</form>
<p> </p>
<!-- InstanceEndEditable -->
<!-- end .content --></div>
<div class="footer">
<p>TopStetik 2012</p>
<!-- end .footer --></div>
<!-- end .container --></div>
</body>
<!-- InstanceEnd --></html>
<?php
mysql_free_result($DatosSlider);
?>
Como redireccionar A otra pagina después de verificar los datos 
