Not sure why this is working

[[!If? &subject=`[[UltimateParent]]` &operator=`isnot` &operand=`3` &then=`[[*feature_right]]`]]

[[!FeatureRight]]

<?php
/* Feature Right snippet */
$homeId = 1; // set to the ID of your home page;

if ($modx->resource->get('id') != $homeId) {
    return ''[[*Feature_right]]';
} else {
    return "";
}

[[!FeatureRight]]

<?php
/* Feature Right snippet */
$homeId = 1; // set to the ID of your home page;

if ($modx->resource->get('id') == $homeId) {
    return "";
} else {
    return '[[*Feature_right]]';
}

<?php
/* Feature Right snippet */
$homeId = 1; // set to the ID of your home page;

return $modx->resource->get('id') == $homeId?  "" : '[[*Feature_right]]';