// This defines a new global Area as an object and assigns it to the variable $footerSiteTitle.
// If the area already exists then the variable will contain the object for the existing area
$footerSiteTitle = new GlobalArea('Footer Site Title');
// Same here for a different global area
$footerSocial = new GlobalArea('Footer Social');
// here we are counting how many blocks were added to the first area (Footer Site Title)
// Since we have the area object in the variable $footerSiteTitle, we can call any of the object's public function. SO here we are calling the function getTotalBlocksInArea() which gives us the number of blocks in the area as the name shows
$footerSiteTitleBlocks = $footerSiteTitle->getTotalBlocksInArea();
// Here the same for the second area
$footerSocialBlocks = $footerSocial->getTotalBlocksInArea();
// here we have a variable $displayFirstSection and we want to give it a value of TRUE or FALSE.
// so IF $footerSiteTitleBlocks is superior to 0 (number of blocks in the first area)
// OR IF $footerSocialBlocks is superior to 0 (number of blocks in the second area)
// OR IF we are in edit mode ($c is the page object and we call the function isEditMode() to find out.
// THEN $displayFirstSection will be TRUE (if ANY of the 3 conditions is TRUE)
// Otherwise it will be FALSE (if NONE of the 3 conditions is TRUE)
$displayFirstSection = $footerSiteTitleBlocks > 0 || $footerSocialBlocks > 0 || $c->isEditMode();