If you want to pass a string into a function and use that string as the property of an object to get the value of that property you can use the following syntax.
function getObjectValueDynamically ($property_to_access) {
$value = $object->{$property_to_access};
return $value;
}
The part that you need to note here is, the parameter is surrounded by two Curly brackets like,
$object->{$property_to_access}
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