This question already has answers here:
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 9 years ago.
my site works well in localhost (everything works fine)
but when I upload it in web and try to redirect the page after updating the data it says -> Cannot modify header information
95% you are trying to set a cookie, mime-type or redirection (short: http header) after you have sent http body, i.e. content. Check if you you have anything including whitespaces outside the php delimeters.
If you use the header function you have to be careful... You can't send any header before the "header location".
ob_start('mypage');
<html>
// Your code ...
</html>
ob_end_flush();
What's the error ? (php.ini, active the errors)
Else you can use the ob_start() function !
Related
This question already has answers here:
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 6 years ago.
I am writing a php-code which redirect me from localhost/login.php to localhost/index.page.
I tried using the header('Location: index.php) method, but i keep receiving an error
Warning: Cannot modify header information - headers already sent by...
The error according to my search is due to a sort of output which is sent before the header() function. Unfortunately, after trying for hours, I could not figure out what is wrong with the code, so I am now looking for an alternative method.
Just another method, to redirect me from my "localhost/login.php" page back to my home page "localhost/index.php".
Instead of using PHP to do the redirect, use a META refresh that causes your browser to follow it:
<meta http-equiv="refresh" content="0; url=http://example.com/">
Information on META redirects: Meta_refresh
This question already has answers here:
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 8 years ago.
I am a beginner in php..
I need to redirect from one php file to another php file..
I used this code for this.
header("Location: stu_rep.html");
but it shows this error..
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\auttvl\admin\stu_rep_view.php:241) in C:\xampp\htdocs\auttvl\admin\stu_rep_view.php on line 492
I need to know what is wrong,Is there any other way to redirect without using header?
Thanks!
Header(); sends a HTTP header. But HTTP headers can only be sent before anything else. In your case, you are probably printing something out before using header();. Remove the printings and your done.
More informations here:
http://www.php.net/manual/de/function.header.php
Headers must be sent before any output is generated on the website. To "work around" this, you can add ob_start(); to the top of your file.
This question already has answers here:
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 8 years ago.
how to jump to other page after header had been sent ?
I have some codes writed in my template file, I want to using php to jump to other page when some condition is true, but I can not use header command here ,for the header info had been sent in other php file before this template file. then how can I jump to other url now ? only the way to use js?
Warning: Cannot modify header information - headers already sent by ...
Use output buffering and header clearing to achieve this.
ob_start()
...
if (!headers_sent()) {
foreach (headers_list() as $header)
header_remove($header);
}
ob_flush_end()
Untested, but give it a shot.
The anaswer from CP510 is good. Another way would be to use javascript to redirect the page. To quote Ryan McGeary answer, you could do either
// similar behavior as an HTTP redirect
window.location.replace("http://stackoverflow.com");
or
// similar behavior as clicking on a link
window.location.href = "http://stackoverflow.com";
you have two options.
Move your header location before sending any output.
use a client side redirection and you have two ways to do this
a/ using javascript
window.location = "http://www.yoururl.com";
b/ using meta
<META http-equiv="refresh" content="5;URL=http://www.yourlink.com/new-link">
The best solution here How to fix "Headers already sent" error in PHP
This question already has answers here:
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 9 years ago.
I have started my session in config.php file & i have included that file on every page on my site,
my site works fine in localhost,
but when i have done live to it,it shows error like this,
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent
Any suggestions...
Thanks,
check that you don't send content before calling session_start. Just make session_start the first thing you do in your PHP file.
<?php session_start(); ?>
If you will have space after closing PHP Tags in your config.php at the end of your code then also these warning will come.
So make sure you don't have any space after closing of PHP Tags which is ?>
This question already has answers here:
Warning: Cannot modify header information - headers already sent by [closed]
(3 answers)
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 9 years ago.
I want open new web page to display the image,when my php was create the image
<?
.........
$img = $file.create_image; // $img like http://abc.com/abc.jpg
header("Location: $img");
?>
when i using header, it have a error
Cannot modify header information - headers already sent by (output....
or using other php function to open new page.
The headers needs to be written before any other content, this means you have to remove any white spaces/empty lines at the top of your document. You have to make sure that any HTML or echo statements is executed AFTER your header statement.
if you're using session in this page then write
ob_start(); on top of page (1st line)