千里码-访客统计

最近发现个好网站千里码，里面有很多知名公司CODER把实际工作中经常用到的技术点，或者比较有意义的问题以题目的形式重现，有兴趣的可以去看看，下面是链接地址：http://www.qlcoder.com/home

<span><span><?php</span><span>$a</span>=<span>new</span> countt();
<span>$a</span>->cc();
<span><span>class</span><span>countt</span>{</span><span><span>function</span><span>cc</span><span>()</span>
    {</span><span>$arr</span>=<span>array</span>();
        <span>$count</span>=<span>0</span>;
        <span>$f</span>=file(<span>"uv.txt"</span>);
        <span>foreach</span>(<span>$f</span><span>as</span><span>$k</span>=><span>$v</span>)
        {
            <span>$a</span>=explode(<span>" "</span>,<span>$v</span>);
            <span>$arr</span>[]=<span>$a</span>[<span>1</span>];
        }
        sort(<span>$arr</span>);
        <span>//print_r(array_unique($arr));</span><span>echo</span> count(array_unique(<span>$arr</span>));

    }
}
<span>?></span></span>