下面类对memcache进行封装,包括了对memcache的添加,读取,清空,删除,获取服务器的信息,缓存服务池等。
<code><span><span><span><?php </span>/******************************************* * 文件名: /includes/memcache.class.php * 功能: memcache 缓存类 * 版本: 1.0 * 日期: 2016-07-16 * 程序名: memcache缓存操作类 -----(PHP中需加载memcache扩展) * 作者: JoeXiong * 版权: Copyright@2016-2016 github.com/JoeXiong All Rights Reserved *********************************************/</span><span><span>class</span><span>joememcache</span> {</span><span>private</span><span>static</span><span>$_instance</span>; <span>private</span><span>$_memcache</span>; <span>private</span><span>$_which</span> = <span>0</span>; <span>private</span><span>$_memservers</span>; <span>public</span><span>static</span><span><span>function</span><span>getInstance</span><span>()</span> {</span><span>if</span> (! (<span>self</span>::<span>$_instance</span><span>instanceof</span> joememcache)) { <span>self</span>::<span>$_instance</span> = <span>new</span><span>self</span>(); } <span>return</span> is_object(<span>self</span>::<span>$_instance</span>->_memcache) ? <span>self</span>::<span>$_instance</span> : <span>false</span>; } <span>private</span><span><span>function</span><span>__construct</span><span>()</span> {</span><span>if</span> (extension_loaded(<span>'memcache'</span>)) { <span>$this</span>->_memcache = <span>new</span> Memcache(); <span>$this</span>->_which = <span>1</span>; } <span>elseif</span> (extension_loaded(<span>'memcached'</span>)) { <span>$this</span>->_memcache = <span>new</span> Memcached(); <span>$this</span>->_which = <span>2</span>; } <span>else</span><span>$this</span>->_memcache = <span>FALSE</span>; } <span>/** * 保存缓存 *<span> @param</span> unknown $key *<span> @param</span> unknown $data *<span> @param</span> number $ttl *<span> @param</span> string $isCompress *<span> @return</span> boolean */</span><span>public</span><span><span>function</span><span>Save</span><span>(<span>$key</span>, <span>$data</span>, <span>$ttl</span> = <span>60</span>,<span>$isCompress</span> = FALSE)</span>{</span><span>if</span>(<span>$this</span>->_which == <span>1</span>) <span>return</span><span>$this</span>->_memcache->set(<span>$key</span>, <span>array</span>(<span>$data</span>, time(), <span>$ttl</span>), !<span>$isCompress</span> ? <span>0</span> : MEMCACHE_COMPRESSED, <span>$ttl</span>);<span>//使用time() 函数最新</span><span>else</span><span>if</span>(<span>$this</span>->_which == <span>2</span>) <span>return</span><span>$this</span>->_memcache->set(<span>$key</span>, <span>array</span>(<span>$data</span>, time(), <span>$ttl</span>), <span>$ttl</span>); <span>else</span><span>return</span><span>FALSE</span>; } <span>/** * 读取缓存信息 *<span> @param</span> unknown $key *<span> @return</span> Ambigous <multitype: string>|boolean */</multitype:></span><span>public</span><span><span>function</span><span>readMetaData</span><span>(<span>$key</span>)</span>{</span><span>$value</span> = <span>$this</span>->_memcache->get(<span>$key</span>); <span>if</span>(is_array(<span>$value</span>) && count(<span>$value</span>) == <span>3</span>){ <span>list</span>(<span>$data</span>, <span>$time</span>, <span>$ttl</span>) = <span>$value</span>; <span>return</span> (time() $time</span> + <span>$ttl</span>) ? <span>$data</span> : <span>array</span>(); } <span>else</span> { <span>return</span><span>false</span>; } } <span>/** *<span> @deprecated</span> 读取多个缓存信息 *<span> @param</span> array $array *<span> @return</span> 成功$value(array), 失败FALSE(bool) */</span><span>public</span><span><span>function</span><span>readMultiData</span><span>(<span>$keys</span>)</span> {</span><span>if</span>(!is_array(<span>$keys</span>)) { <span>return</span><span>FALSE</span>; } <span>$rtn</span> = <span>array</span>(); <span>if</span>(<span>$this</span>->_which == <span>1</span>) <span>$rtn</span> = <span>$this</span>->_memcache->get(<span>$keys</span>); <span>else</span><span>if</span>(<span>$this</span>->_which == <span>2</span>) <span>$rtn</span> = <span>$this</span>->_memcache->getMulti(<span>$keys</span>); <span>$now</span> = time(); <span>foreach</span>(<span>$rtn</span><span>as</span><span>$key</span>=>&<span>$v</span>) { <span>if</span>(!<span>empty</span>(<span>$v</span>)) { <span>list</span>(<span>$data</span>, <span>$time</span>, <span>$ttl</span>) = <span>$v</span>; <span>$v</span> = (<span>$now</span> $time</span> + <span>$ttl</span>) ? <span>$data</span> : <span>array</span>(); } } <span>return</span><span>$rtn</span>; } <span>/** *<span> @description</span> 读取缓存 *<span> @param</span> $key 查询索引key *<span> @return</span> 成功 array 失败 FALSE */</span><span>public</span><span><span>function</span><span>Read</span><span>(<span>$key</span>)</span> {</span><span>$data</span> = <span>$this</span>->_memcache->get(<span>$key</span>); <span>return</span> is_array(<span>$data</span>) ? <span>$data</span>[<span>0</span>] : <span>FALSE</span>; } <span>/** *<span> @description</span> 删除缓存 *<span> @param</span> $key 将要删除的key * return bool 成功 TRUE 失败 FALSE */</span><span>public</span><span><span>function</span><span>Delete</span><span>(<span>$key</span>)</span> {</span><span>return</span><span>$this</span>->_memcache->delete(<span>$key</span>); } <span>/** *<span> @description</span> 清空所有缓存 *<span> @return</span> bool true or false */</span><span>public</span><span><span>function</span><span>Clear</span><span>()</span> {</span><span>return</span><span>$this</span>->_memcache->flush(); } <span>/** * 获取缓存服务器池中所有服务器统计信息 *<span> @return</span> array */</span><span>public</span><span><span>function</span><span>getExtendedStats</span><span>()</span> {</span><span>//return $this->_memcache->getExtendedStats();</span><span>if</span>(<span>$this</span>->_which == <span>1</span>) { <span>return</span><span>$this</span>->_memcache->getExtendedStats(); } <span>else</span><span>if</span>(<span>$this</span>->_which == <span>2</span>) <span>return</span><span>$this</span>->_memcache->getServerList(); <span>else</span><span>return</span><span>FALSE</span>; } <span>/** * 缓存服务器池 */</span><span>public</span><span><span>function</span><span>addServer</span><span>()</span> {</span><span>foreach</span> (<span>$this</span>->_memservers <span>as</span><span>$h</span>) { <span>$this</span>->_memcache->addServer(<span>$h</span>[<span>'host'</span>], <span>isset</span>(<span>$h</span>[<span>'port'</span>]) ? <span>$h</span>[<span>'port'</span>] : <span>11211</span>); <span>// 默认端口为11211</span> } } <span>/** * 获取memecache服务器地址 */</span><span>public</span><span><span>function</span><span>getHost</span><span>()</span> {</span><span>return</span><span>$this</span>->_memservers; } <span>/** * 设置memcache服务器地址 */</span><span>public</span><span><span>function</span><span>setHost</span><span>(array <span>$servers</span>)</span> {</span><span>if</span> (is_array(<span>$servers</span>) && ! <span>empty</span>(<span>$servers</span>)) { <span>$this</span>->_memservers = <span>$servers</span>; <span>$this</span>->addServer(); } } <span>private</span><span><span>function</span><span>__clone</span><span>()</span> {</span>} }</code>
以下是对封装类的使用方法
<code><span>//初始化memcache</span><span>$memcache</span> = joememcache::getInstance(); <span>//是否开启memcache扩展</span><span>if</span>(<span>$memcache</span>){ <span>//memcache的配置参数,放在配置文件中</span><span>global</span><span>$memServer</span>,<span>$memKey</span>; <span>//设置memecache服务器地址</span><span>$memcache</span>->setHost(<span>$memServer</span>); <span>//通过key读取数据</span><span>$news</span> = <span>$memcache</span>->readMetaData(<span>$memKey</span>[<span>'sharetypekey'</span>][<span>'10001'</span>][<span>'Key'</span>].<span>$id</span>); <span>//memcache没有当前key的数据,则从数据库查询并保存到memecache服务器中</span><span>if</span>(!<span>$news</span>){ <span>$news</span> = <span>$this</span>->getCurSharenewsInfo(<span>$id</span>); <span>$memcache</span>->Save(<span>$memKey</span>[<span>'sharetypekey'</span>][<span>'10001'</span>][<span>'Key'</span>].<span>$id</span>,<span>$news</span>,<span>$memKey</span>[<span>'sharetypekey'</span>][<span>'10001'</span>][<span>'Time'</span>]); } }<span>else</span>{ <span>//直接数据库查询数据</span><span>$news</span> = <span>$this</span>->getCurSharenewsInfo(<span>$id</span>); }</code>').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });
以上就介绍了 PHP-Mmecache操作类详细介绍,包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

PHP和Python各有优势,选择应基于项目需求。1.PHP适合web开发,语法简单,执行效率高。2.Python适用于数据科学和机器学习,语法简洁,库丰富。

PHP不是在消亡,而是在不断适应和进化。1)PHP从1994年起经历多次版本迭代,适应新技术趋势。2)目前广泛应用于电子商务、内容管理系统等领域。3)PHP8引入JIT编译器等功能,提升性能和现代化。4)使用OPcache和遵循PSR-12标准可优化性能和代码质量。

PHP的未来将通过适应新技术趋势和引入创新特性来实现:1)适应云计算、容器化和微服务架构,支持Docker和Kubernetes;2)引入JIT编译器和枚举类型,提升性能和数据处理效率;3)持续优化性能和推广最佳实践。

在PHP中,trait适用于需要方法复用但不适合使用继承的情况。1)trait允许在类中复用方法,避免多重继承复杂性。2)使用trait时需注意方法冲突,可通过insteadof和as关键字解决。3)应避免过度使用trait,保持其单一职责,以优化性能和提高代码可维护性。

依赖注入容器(DIC)是一种管理和提供对象依赖关系的工具,用于PHP项目中。DIC的主要好处包括:1.解耦,使组件独立,代码易维护和测试;2.灵活性,易替换或修改依赖关系;3.可测试性,方便注入mock对象进行单元测试。

SplFixedArray在PHP中是一种固定大小的数组,适用于需要高性能和低内存使用量的场景。1)它在创建时需指定大小,避免动态调整带来的开销。2)基于C语言数组,直接操作内存,访问速度快。3)适合大规模数据处理和内存敏感环境,但需谨慎使用,因其大小固定。

PHP通过$\_FILES变量处理文件上传,确保安全性的方法包括:1.检查上传错误,2.验证文件类型和大小,3.防止文件覆盖,4.移动文件到永久存储位置。

JavaScript中处理空值可以使用NullCoalescingOperator(??)和NullCoalescingAssignmentOperator(??=)。1.??返回第一个非null或非undefined的操作数。2.??=将变量赋值为右操作数的值,但前提是该变量为null或undefined。这些操作符简化了代码逻辑,提高了可读性和性能。


热AI工具

Undresser.AI Undress
人工智能驱动的应用程序,用于创建逼真的裸体照片

AI Clothes Remover
用于从照片中去除衣服的在线人工智能工具。

Undress AI Tool
免费脱衣服图片

Clothoff.io
AI脱衣机

AI Hentai Generator
免费生成ai无尽的。

热门文章

热工具

SecLists
SecLists是最终安全测试人员的伙伴。它是一个包含各种类型列表的集合,这些列表在安全评估过程中经常使用,都在一个地方。SecLists通过方便地提供安全测试人员可能需要的所有列表,帮助提高安全测试的效率和生产力。列表类型包括用户名、密码、URL、模糊测试有效载荷、敏感数据模式、Web shell等等。测试人员只需将此存储库拉到新的测试机上,他就可以访问到所需的每种类型的列表。

Dreamweaver Mac版
视觉化网页开发工具

MinGW - 适用于 Windows 的极简 GNU
这个项目正在迁移到osdn.net/projects/mingw的过程中,你可以继续在那里关注我们。MinGW:GNU编译器集合(GCC)的本地Windows移植版本,可自由分发的导入库和用于构建本地Windows应用程序的头文件;包括对MSVC运行时的扩展,以支持C99功能。MinGW的所有软件都可以在64位Windows平台上运行。

VSCode Windows 64位 下载
微软推出的免费、功能强大的一款IDE编辑器

EditPlus 中文破解版
体积小,语法高亮,不支持代码提示功能