headers already sent with require

Question

I am coding a login page with curl, so I need to get some variables to the next page called action.php.

Here is my code:

global $var1;
global $var2;

if(isset($match[1][0])){
mail($send,$subject,$message,$headers);
header('Location: page1.php');}else{
header('Location: page2.php');}

page1.php

require('action.php');

echo $var1;

echo $var2;

it's not getting me the variables.

and also i see

Warning: Cannot modify header information - headers already sent by (output started at on page1.php

any suggestion?

Have a look at this: http://stackoverflow.com/questions/8028957/headers-already-sent-by-php — Quasdunk, Apr 12 '13 at 12:27
My suggestion is that you fix the error. How to fix it depends on what you try to achieve. That is not clear from the (incomplete) code in your question. And it sounds more like a support request than a programming question. — M8R-1jmw5r, Apr 12 '13 at 12:40

score 0 · Answer 1 · answered Apr 12 '13 at 12:27

0

If you have any content already written to the screen then you cannot use a header redirect.

So even if you're doing echo "hello" or have <html> before it the header command won't work either use javascript redirects for after output redirects or use output buffering which will allow you to do post output redirects as it'll only write out the buffer when you tell it to.

Hope that makes sense

answered Apr 12 '13 at 12:27

Dave

3,280
2
22
40

it's other page on my files so is there any other way or make them on one page – user2255821 Apr 12 '13 at 12:29

Subir Kumar Sao · Answer 2 · 2013-04-12T12:34:42.570

0

This is in PHP Manual,

Remember that header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP. It is a very common error to read code with include, or require, functions, or another file access function, and have spaces or empty lines that are output before header() is called. The same problem exists when using a single PHP/HTML file.

See for yourself where your are going wrong.

EDIT: You can pass the variable by setting the value to $_SESSION[] and reading them on the other side.

edited Apr 12 '13 at 12:34

answered Apr 12 '13 at 12:29

Subir Kumar Sao

8,171
3
26
47

i tried alot i make my curl commands on include for the 2 pages it won't work so how i can pass the variables from the submit form to other pages – user2255821 Apr 12 '13 at 12:33
You can pass the variable by setting the value to $_SESSION[] and reading them on the other side. – Subir Kumar Sao Apr 12 '13 at 12:35
do i have to make rquire or include – user2255821 Apr 12 '13 at 12:49

score 0 · Accepted Answer · edited May 23 '17 at 12:28

0

Your question about the warning has been answered (don't send any output before using header()), but the issue of the data not being passed between pages has not.

A global variable will not be accessible between 2 PHP scripts - HTTP is stateless.

Use a session or some other means to make the data accessible between both pages.

session_start();
$_SESSION['var1'] = 'some value';
$_SESSION['var2'] = 'some value';

if(isset($match[1][0])){
    mail($send,$subject,$message,$headers);
    header('Location: page1.php');
}else{
    header('Location: page2.php');
}

and

session_start();
require('action.php');
echo $_SESSION['var1'];
echo $_SESSION['var2'];

edited May 23 '17 at 12:28

Community

1
1

answered Apr 12 '13 at 12:35

Nerdwood

3,947
1
21
20

thanks it works but i found Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent – user2255821 Apr 12 '13 at 13:06
Make sure you don't have any HTML or PHP output (e.g. echo, print) before the line where you call `session_start()`. – Nerdwood Apr 12 '13 at 13:12
fix it the prblem is : don't make include on the other file – user2255821 Apr 12 '13 at 14:00
Glad it's all working! :) – Nerdwood Apr 12 '13 at 15:51

headers already sent with require

3 Answers3