Decrease memory usage of recursive functions in PHP

I have a recursive function in PHP where it loops in an api where it only allows you to retrieve 200 records of it at a time.

But as this API has a very high latency response we decided to use a local intermediate database where I add these records and it will be shown on the site.

But since this API has more than 30 thousand records, the recursive function consumes a lot of memory because in the case of 30 thousand records it would have to be invoked recursively over 1500 times and this ends up giving the famous StackOverflow.

I would like to know if there is a manual way of clearing the memory of this function by calling it again without losing its value.

Code sample:

public function recursive($index = 0, $offset = 200){
   $api = getConectApi($index,offset)->getRecords();
   foreach($api as $value){
      //aqui ocorre meu loop necessário
   }
   if(count($api) > 0){
     $this->recursive($index+200,$offset+200);
   }
}

I would like to find a way that when I call the recursive function again delete the previous allocation without losing the reference value that was passed.