How to load a block of code conditionally using PHP?

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I have a single installation of WordPress that is powering two domain names. To put it very simply, Site A has four static pages, and Site B has four static pages, but they both share a common blog-posts page.

Site A should have a navbar at the top that points to the other Site A pages and Site B should have a navbar that points to the other Site B pages.

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Since they (necessarily) share a common WordPress theme, in the header.php file I would like to put a PHP if statement for a block of code that is the Site A nav and another for the Site B nav. But I’m not sure what condition to actually check for. Is there some way I can cause some pages to identify themselves to PHP as belonging to Site A, and others to Site B?

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3 comments

  1. You could set variables in both sites before the header call, then use an if statement to show the right navigation.

    Site A

    <?
$site = 'A';
require('header.php');
?>

    header.php

    <?
if($site == 'A') {
  //Site A nav
} else {
  //Site B nav
}
?>

    However, if your two sites have different domain names, you could look at the $_SERVER global and key off of that directly in your header.php instead.

  2. If this two websites have different domain name you can validate by doing:

    if($_SERVER['HTTP_HOST']=="sitea.com"){
   //code for site a
} else {
   //code for site b
}