Warning: Cannot modify header information - headers already sent by

I have 1 problem in my web

is this:

Warning: Cannot modify header information - headers already sent by (output started at /home/user/public_html/subdomain/index.php:4) in /home/user/public_html/subdomain/conectar.php on line 22

Code (markup):

and the conectar.php

<?php
session_start();
$_SESSION['Titulo']="title";
$strUsuario=$_REQUEST['usuario'];
$strContrasena=$_REQUEST['contrasena'];
//echo "Usuario: ".$strUsuario." ".$strContrasena. "<br>";
if(($strUsuario!="")||($strContrasena!="")){
	$conn=mysql_connect("localhost","dates","dates");
	$bd=mysql_select_db("dates",$conn);
	$sql = "SELECT id FROM aso WHERE usuario='".$strUsuario."' AND password='".$strContrasena."'";
	//echo $sql. "<br>";
	$orden_fecha = mysql_query($sql, $conn) or die(mysql_error());
	$result = mysql_fetch_assoc($orden_fecha)or die("errores");
	$total = mysql_num_rows($result);
	//echo "total: ".$total. "<br>";
	//if($total!=0){
		$_SESSION['usuario']=$result['id'];
		//echo "[".$_SESSION['usuario']. "]";
	//}
}else{
	header("Location: ../index.php"); //<<<<------  line 22
}
?>

Code (markup):

thanks for the help

 

http://www.php.net/header

 

I tried the script with apache server and works fine, they redirect me to ../index.php I don't get any errors.

Check what do you have in line #4 on index.php.

Warning: Cannot modify header information - headers already sent by (output started at /home/user/public_html/subdomain/index.php:4)

 

Simply, just put this code:

<?php
session_start();
$_SESSION['Titulo']="title";
$strUsuario=$_REQUEST['usuario'];
$strContrasena=$_REQUEST['contrasena'];
//echo "Usuario: ".$strUsuario." ".$strContrasena. "<br>";
if(($strUsuario!="")||($strContrasena!="")){
	$conn=mysql_connect("localhost","dates","dates");
	$bd=mysql_select_db("dates",$conn);
	$sql = "SELECT id FROM aso WHERE usuario='".$strUsuario."' AND password='".$strContrasena."'";
	//echo $sql. "<br>";
	$orden_fecha = mysql_query($sql, $conn) or die(mysql_error());
	$result = mysql_fetch_assoc($orden_fecha)or die("errores");
	$total = mysql_num_rows($result);
	//echo "total: ".$total. "<br>";
	//if($total!=0){
		$_SESSION['usuario']=$result['id'];
		//echo "[".$_SESSION['usuario']. "]";
	//}
}else{
echo'
<script>
location = "../index.php";
</script>
';
}
?>

PHP:

 

Are you sure that you don't have any whitespace before the <?php tag? Also, do you have any automatically included libs by your server that may have whitespace outside of the PHP blocks?

 

Please check your header.


Use Location not location &
Do not leave any whitespace between header like

header("Location:index.php"); not header("location: index.php");

 

try not closing your php file

remove this

?>

 

Here is a easy fix:

<?php

 ob_start();

?>

PHP:

Just add that before:

<?php

 session_start();

?>

PHP:

I hope i helped.

Thanks,

Michael

 

It worked... Thanks a lot