利用secache来控制接口频繁调用

<?php
require('../secache/secache.php');
$cache = new secache;
$cache->workat('cachedata');
$str=$_GET["str"];
$key = md5($str);
$value = "select *from userinfo";
if($cache->fetch($key,$v)){
    echo "havecache<br>";
    if($cache->fetch(md5("time".$str),$num1)){
        echo "not first time access=>";
        echo $num1;
        $cache->store(md5("time".$str),$num1+1);
    }else{
        echo "first time access";
        $cache->store(md5("time".$str),1);
    }
    echo '<li>'.$key.'=>'.$v.'</li>';
}else{
    $cache->store($key,$value);
    echo '<li>Data get failed! <b>'.$key.'</b></li>';
}
echo $num1."<br>";
if($num1<10){
    echo "正常调用";
}else{
    echo "请稍候重试";
}
?>