2PHP缓存种
2PHP缓存类
<?php /** 缓存类 cache* 作 者:多菜鸟* 联系邮箱:kingerq AT msn DOT com* 创建时间:2006-05-05* 实 例:include( "cache.php" ); $cache = new cache(30);$cache->cacheCheck();echo date("Y-m-d H:i:s");//$cache->clearCache('mv_moves.php');$cache->caching();*/class cache { //缓存目录 var $cacheRoot = "./cache/"; //缓存更新时间秒数,0为不缓存 var $cacheLimitTime = 0; //缓存文件名 var $cacheFileName = ""; //缓存扩展名 var $cacheFileExt = "php"; /* * 构造函数 * int $cacheLimitTime 缓存更新时间 */ function cache( $cacheLimitTime ) { if( intval( $cacheLimitTime ) ) $this->cacheLimitTime = $cacheLimitTime; $this->cacheFileName = $this->getCacheFileName(); ob_start(); } /* * 检查缓存文件是否在设置更新时间之内 * 返回:如果在更新时间之内则返回文件内容,反之则返回失败 */ function cacheCheck(){ if( file_exists( $this->cacheFileName ) ) { $cTime = $this->getFileCreateTime( $this->cacheFileName ); if( $cTime + $this->cacheLimitTime > time() ) { echo file_get_contents( $this->cacheFileName ); ob_end_flush(); exit; } } return false; } /* * 缓存文件或者输出静态 * string $staticFileName 静态文件名(含相对路径) */ function caching( $staticFileName = "" ){ if( $this->cacheFileName ) { $cacheContent = ob_get_contents(); //echo $cacheContent; ob_end_flush(); if( $staticFileName ) { $this->saveFile( $staticFileName, $cacheContent ); } if( $this->cacheLimitTime ) $this->saveFile( $this->cacheFileName, $cacheContent ); } } /* * 清除缓存文件 * string $fileName 指定文件名(含函数)或者all(全部) * 返回:清除成功返回true,反之返回false */ function clearCache( $fileName = "all" ) { if( $fileName != "all" ) { $fileName = $this->cacheRoot . strtoupper(md5($fileName)).".".$this->cacheFileExt; if( file_exists( $fileName ) ) { return @unlink( $fileName ); }else return false; } if ( is_dir( $this->cacheRoot ) ) { if ( $dir = @opendir( $this->cacheRoot ) ) { while ( $file = @readdir( $dir ) ) { $check = is_dir( $file ); if ( !$check ) @unlink( $this->cacheRoot . $file ); } @closedir( $dir ); return true; }else{ return false; } }else{ return false; } } /* * 根据当前动态文件生成缓存文件名 */ function getCacheFileName() { return $this->cacheRoot . strtoupper(md5($_SERVER["REQUEST_URI"])).".".$this->cacheFileExt; } /* * 缓存文件建立时间 * string $fileName 缓存文件名(含相对路径) * 返回:文件生成时间秒数,文件不存在返回0 */ function getFileCreateTime( $fileName ) { if( ! trim($fileName) ) return 0; if( file_exists( $fileName ) ) { return intval(filemtime( $fileName )); }else return 0; } /* * 保存文件 * string $fileName 文件名(含相对路径) * string $text 文件内容 * 返回:成功返回ture,失败返回false */ function saveFile($fileName, $text) { if( ! $fileName || ! $text ) return false; if( $this->makeDir( dirname( $fileName ) ) ) { if( $fp = fopen( $fileName, "w" ) ) { if( @fwrite( $fp, $text ) ) { fclose($fp); return true; }else { fclose($fp); return false; } } } return false; } /* * 连续建目录 * string $dir 目录字符串 * int $mode 权限数字 * 返回:顺利创建或者全部已建返回true,其它方式返回false */ function makeDir( $dir, $mode = "0777" ) { if( ! $dir ) return 0; $dir = str_replace( "\\", "/", $dir ); $mdir = ""; foreach( explode( "/", $dir ) as $val ) { $mdir .= $val."/"; if( $val == ".." || $val == "." || trim( $val ) == "" ) continue; if( ! file_exists( $mdir ) ) { if([email protected]( $mdir, $mode )){ return false; } } } return true; }}?>

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Many users will choose the Huawei brand when choosing smart watches. Among them, Huawei GT3pro and GT4 are very popular choices. Many users are curious about the difference between Huawei GT3pro and GT4. Let’s introduce the two to you. . What are the differences between Huawei GT3pro and GT4? 1. Appearance GT4: 46mm and 41mm, the material is glass mirror + stainless steel body + high-resolution fiber back shell. GT3pro: 46.6mm and 42.9mm, the material is sapphire glass + titanium body/ceramic body + ceramic back shell 2. Healthy GT4: Using the latest Huawei Truseen5.5+ algorithm, the results will be more accurate. GT3pro: Added ECG electrocardiogram and blood vessel and safety

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