simple php define in drupal template

Question

I have next to no experience with php as a language, and am running it a little problem in producing a Drupal theme. What I need is to execute a function once, that will return a Boolean, then use that Boolean throughout the template.

Here is what I have so far:

html.tpl.php->

<?php 

   function testMobile(){
       return false;
   }

   define('isMobile', testMobile());

?>

...

<?php 
    if(!isMobile){
        echo '<h1>NOT MOBILE</h1>';
    }else{
        echo '<h1>IS MOBILE</h1>';
    }
?>

page.tpl.php->

<?php 
   if(!isMobile){
       echo '<h1>IS DESKTOP</h1>';
   }else{
       echo '<h1>NOT DESKTOP</h1>';
   }
?>

In the drupal output I get this ->

NOT MOBILE

NOT DESKTOP

along with this error message:

Notice: Use of undefined constant isMobile - assumed 'isMobile' in include() (line 77 of /Users/#/#/#/sites/all/themes/#/templates/page.tpl.php).

what am I doing wrong here? How can I most easily achieve my goal?

Fresheyeball · Accepted Answer · 2013-03-04 18:10:42Z

3

It seems that the defined variable is falling out of the scope of the template file. You can simply solve this by using a session variable.

Below is a code sample ...

session_start(); // not necessary with drupal
$_SESSION['isMobile'] = testMobile();

function testMobile(){
   return false;
}

In your template you can add following...

<?php 
   if(!$_SESSION['isMobile']){
       echo '<h1>IS DESKTOP</h1>';
   }else{
       echo '<h1>NOT DESKTOP</h1>';
   }
?>

edited Mar 4, 2013 at 18:10

Fresheyeball

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answered Mar 4, 2013 at 18:04

Jay Bhatt

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Comments

AKS · Accepted Answer · 2013-03-05 19:45:26Z

0

Try to define variable in template.php in hook_theme_preprocess_page(&$vars, $hook).

So template.php can looks follow way:

function testMobile(){
  return false;
}

function YOURTHEME_theme_preprocess_page(&$vars, $hook) {
  $vars['isMobile'] = testMobile();
}

And page.tpl.php

<?php 
   if(!$isMobile){
       echo '<h1>IS DESKTOP</h1>';
   }else{
       echo '<h1>NOT DESKTOP</h1>';
   }
?>

edited Mar 5, 2013 at 19:45

AKS

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answered Mar 5, 2013 at 11:27

Vadim Eremeev

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