php开发app接口之静态缓存-php手册-PHP中文网

php开发app接口之静态缓存

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发布： 2016-06-06 19:42:21

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(1) 静态缓存这里技术的本质是我们将我们所需要的一些数据临时存在服务器的一些文件中。 ?php class File { private $_dir ; const EXT= 'php' ; public function __construct () { $this -_dir=dirname( __FILE__ ). '/files/' ; } public function cache

(1)静态缓存
这里技术的本质是我们将我们所需要的一些数据临时存在服务器的一些文件中。

<span><span><?php</span>
<span><span>class</span> <span>File</span>
{</span>
    <span>private</span> <span>$_dir</span>;
    <span>const</span> EXT=<span>'php'</span>;
    <span>public</span> <span><span>function</span> <span>__construct</span><span>()</span>
    {</span>
        <span>$this</span>->_dir=dirname(<span>__FILE__</span>).<span>'/files/'</span>;
    }
    <span>public</span> <span><span>function</span> <span>cacheDate</span><span>(<span>$key</span>,<span>$value</span>=<span>''</span>,<span>$path</span>=<span>''</span>)</span> 
    {</span>
        <span>$filename</span>=<span>$this</span>->_dir.<span>$path</span>.<span>$key</span>.<span>self</span>::EXT;
        <span>//将value值写入<strong>缓存</strong></span>
        <span>if</span>(<span>$value</span>!==<span>''</span>)
        {
            <span>//如果value值为null</span>
            <span>if</span>(is_null(<span>$value</span>))
            {
                <span>return</span> unlink(<span>$filename</span>);
            }
            <span>$dir</span>=dirname(<span>$filename</span>);
            <span>if</span>(!is_dir(<span>$dir</span>))
            {
                mkdir(<span>$dir</span>,<span>0777</span>);
            }
            <span>return</span> file_put_contents(<span>$filename</span>,json_encode(<span>$value</span>));
        }
        <span>if</span>(!is_file(<span>$filename</span>))
        {
            <span>return</span> <span>FALSE</span>;
        }
        <span>else</span>
        {
            <span>return</span> json_decode(file_get_contents(<span>$filename</span>),<span>true</span>);
        }
    }
}</span>

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这里封装了一个类，下面是测试代码

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<span><span><?php</span>
<span>require_once</span> <span>'./File.php'</span>;
<span>$data</span>=<span>array</span>(
    <span>'id'</span>=><span>1</span>,
    <span>'name'</span>=><span>'singwa'</span>,
    <span>'type'</span>=><span>array</span>(<span>4</span>,<span>5</span>,<span>6</span>),
    <span>'test'</span>=><span>array</span>(<span>1</span>,<span>45</span>,<span>67</span>=><span>array</span>(<span>123</span>,<span>'tsysa'</span>)),
);
<span>$file</span>=<span>new</span> File();
<span>//增加<strong>缓存</strong>的方式 这样会将指定的数据放入指定文件夹中</span>
<span>if</span>(<span>$file</span>->cacheDate(<span>'index_mk_cache'</span>),<span>$data</span>)
{
    var_dump(<span>$file</span>->cacheDate(<span>'index_mk_cache'</span>));
    <span>echo</span> <span>"success"</span>;
}
<span>else</span> 
{
    <span>echo</span> <span>"error"</span>;
}
<span>//取出<strong>缓存</strong>的方式</span>
<span>if</span>(<span>$file</span>->cacheDate(<span>'index_mk_cache'</span>))
{
    var_dump(<span>$file</span>->cacheDate(<span>'index_mk_cache'</span>));
    <span>echo</span> <span>"success"</span>;
}
<span>else</span> 
{
    <span>echo</span> <span>"error"</span>;
}
<span>//删除<strong>缓存</strong>的方式</span>
<span>if</span>(<span>$file</span>->cacheDate(<span>'index_mk_cache'</span>)，<span>$value</span>=<span>null</span>)
{
    var_dump(<span>$file</span>->cacheDate(<span>'index_mk_cache'</span>));
    <span>echo</span> <span>"success"</span>;
}
<span>else</span> 
{
    <span>echo</span> <span>"error"</span>;
}</span>

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