Problem with switching columns on/off

Hi,

I'm having trouble with switching columns on/off on the home page and category lists. I have added the code if tpl_main_page file (see below) to switch off columns for the home page and it works fine, BUT...it also switches them off on the category lists which I don't want. Not too hot with PHP so not sure how to add the extra code to ensure that it is only switched off for the home page.

// the following IF statement can be duplicated/modified as needed to set additional flags
if (in_array($current_page_base,explode(",",'contact_us,conditions,index')) ) {
$flag_disable_right = true;
}
// the following IF statement can be duplicated/modified as needed to set additional flags
if (in_array($current_page_base,explode(",",'conditions,index')) ) {
$flag_disable_left = true;
}
Cheers,
Adam.

The easiest way to affect the home page is to use```php
if ($this_is_home_page) {
$flag_disable_left = true;
$flag_disable_right = true;
}

Worked perfectly - thank you Glenn, much appreciated