www programming

if(!empty($_SERVER['REQUEST_URI']))
{
 if(substr($_SERVER['REQUEST_URI'], -1, 1) == '/'){
  $REQUEST_URI = substr($_SERVER['REQUEST_URI'], 0, -1);
 }

 $siteUrl = get_option('siteurl');

 if(substr($siteUrl, -1, 1) == '/'){
  $siteUrl = substr($siteUrl, 0, -1);
 }

if(!empty($REQUEST_URI)){
  $r = strpos($siteUrl, $REQUEST_URI);
  if($r !== false)
  { $HOMEPAGE = true; }
 } elseif ( $_SERVER['REQUEST_URI'] == '/'  OR empty($REQUEST_URI) ){ $HOMEPAGE = true; }
}

var_dump($HOMEPAGE);

To detect always, using any permalink, into any stack point, if we are into WordPress homepage, this is the way
( also answered here, because others are all wrongs and there is no answer/solution over all internet (almost for what i have find out): https://stackoverflow.com/questions/4920736/what-are-the-different-ways-to-detect-home-page-in-wordpress/71355373#71355373 )

[code]if(!empty($_SERVER['REQUEST_URI']))
{
if(substr($_SERVER['REQUEST_URI'], -1, 1) == '/'){
$REQUEST_URI = substr($_SERVER['REQUEST_URI'], 0, -1);
}

$siteUrl = get_option('siteurl');

if(substr($siteUrl, -1, 1) == '/'){
$siteUrl = substr($siteUrl, 0, -1);
}

if(!empty($REQUEST_URI)){
$r = strpos($siteUrl, $REQUEST_URI);
if($r !== false)
{ $HOMEPAGE = true; }
} elseif ( $_SERVER['REQUEST_URI'] == '/' OR empty($REQUEST_URI) ){ $HOMEPAGE = true; }
}

var_dump($HOMEPAGE);[/code]