Redircting to a page in PHP [duplicate]

问题:

This question already has an answer here:

• How to fix “Headers already sent” error in PHP 11 answers

I am trying to make a redirect to page based on its referrer. the layout is like

<?php
$URL_REF = $_SERVER['HTTP_REFERER'];
if($URL_REF == "url of my site") {
    header("Location: url of another site"); 
    exit();
}
else    {
    header("Location: my home page"); 
    exit();
}

?>

I am getting the error : Cannot modify header information - headers already sent by.

I have to modify my php.ini to output_buffering = On but I can't do this as I have a shared hosting account in hostgator. can anyone suggest me what options now I have? can I do it by changing my code? If yes, than what changes?

回答1:

<?php
function custom_redirect() {
$URL_REF = $_SERVER['HTTP_REFERER'];
if($URL_REF == "url of my site") {
    header("Location: url of another site"); 
    exit();
}
else    {
    header("Location: my home page"); 
    exit();
}
}
add_action('init','custom_redirect');
?>

Try hooking your function to INIT HOOK

回答2:

Hi actually header("Location: url of another site"); will not support in wordpress. Instead of this you can use

<?php wp_redirect( 'http://www.example.com', 301 ); exit; ?>

and for home page just use <?php wp_redirect( home_url() ); exit; ?> this will solve your problem of redirection.

回答3:

try using javascript instead

<?php
$URL_REF = $_SERVER['HTTP_REFERER'];
if($URL_REF == "url of my site") {
   ?>
   <script type="text/javascript">window.location = "http://www.yoururl.com";</script>
   <?php
}
else    {
    ?>
     <script type="text/javascript">window.location = "http://www.anotherlocation.com";</script>
    <?php
}

?>

check the reference here

回答4:

Header Information already sent is a wordpress's common error, like as you mentioned you want to redirect the web site then you have to options to follow.

1. Create a wordpress Template file do not call header in that file

   <?php /* Template Name:Redirect*/ ?> <?php //get_header();?> <!-- Do not un comment this function -->Write your code here Write your code here Write your code here Write your code here <?php get_footer();?>

2. Or you can redirect with java script's window.location function

   <script>document.write(location.http://google.com); </script>