<?php
 $llamar = new class{
   public function curl($file){
     $ch = curl_init();
     sleep(5);
     curl_setopt($ch, CURLOPT_URL, "https://webdeejemplo.com/images/API5/".$file);
     curl_setopt($ch, CURLOPT_NOBODY, 1);
     curl_setopt($ch, CURLOPT_HEADER, 0);
     curl_exec($ch);
     curl_close($ch);
   }
 };
 foreach (glob("producto-*.php") as $name){
   $llamar->curl($name);
 }
?>