own PHP Cache class php own write template engine own computer run PHP website own write MVC php box

<?php/** * Cache class, implement data, output cache * @author Zhouhr 2012-11-09 http://www.ketann.com * @copyright version 0.1 */class cache{p    Rivate static $_instance;    protected $_cacheid = null;    Const Cleaning_mode_all = ' all ';    Const Cleaning_mode_old = ' old ';                  Protected $_options = Array (' cache_dir ' = null,//Data cache directory ' Life_time ' = 7200, Cache time ' page_dir ' = null,//Text cache directory ' Cache_prefix ' = ' cache_ '//    cache prefix); Private Function __construct () {}///Create __clone method prevents object from being copied clone private Function __clone () {}/** * Fetch cache object If there is a direct Returns if the instantiation itself does not exist * @return Object Cache */public static function getinstance () {if (! Self::$_instan        CE) {self::$_instance = new self ();    } return self::$_instance; /** * Set the cache parameter set * @param array $options The set of cache parameter sets */Public function setoptions ($options = Array ( )) {WHIle (List ($name, $value) = each ($options)) {$this->setoption ($name, $value); }}/** * Gets the current cache parameter, returns the parameter value if $name returns all parameters as null @param string $name The parameter name to return * @return string or array     $option;           */Public Function getOption ($name = null) {if (null = = = $name) return $this->_options;        if (!is_string ($name)) {throwexception ("Incorrect parameter name: $name");        } if (Array_key_exists ($name, $this->_options)) {return $this->_options[$name];           }}/** * Set cache parameters * @param array $options The cache parameter to set */protected function setOption ($name, $value) {        if (!is_string ($name)) {throwexception ("Incorrect parameter name: $name");        } $name = Strtolower ($name);        if (Array_key_exists ($name, $this->getoption ())) {$this->_options[$name] = $value; } if ($this->_options[' cache_dir ') = = = null) {$this-> SetOption (' Cache_dir ', $this->gettmpdir ().        Directory_separator); } if ($this->_options[' page_dir ') = = = null) {$this->setoption (' Page_dir ', $this->gettmp Dir ().        Directory_separator); }}/** * Read data cache, if not present or expired, returns false * @param string $id Cache ID * @return false or data */public F               Unction Load ($id) {$this->_cacheid = $id; $file = $this->getoption (' Cache_dir '). $this->getoption (' Cache_prefix ').                       $this->_cacheid;         if (@filemtime ($file) >= time ()) {return unserialize (file_get_contents ($file));            } else {@unlink ($file);        return false;     }}/** * Save data cache and set cache expiration time * @param array or string $data data to be cached * @param int $lifeTime Cache Expiration Time */ Public function Save ($data, $lifeTime = null) {if (null!== $lifeTime) $this->setoption (' life_t           IME ', $lifeTime); $filE = $this->getoption (' Cache_dir '). $this->getoption (' Cache_prefix ').        $this->_cacheid;        $data = serialize ($data);        @file_put_contents ($file, $data);        @chmod ($file, 0777);    @touch ($file, Time () + $this->getoption (' life_time '));        /** * Read output cache, if not present or cache expires will reopen output cache * @param string $id Cache ID */Public Function start ($id) {        $this->_cacheid = $id; $file = $this->getoption (' Page_dir '). $this->getoption (' Cache_prefix ').                       $this->_cacheid;        if (@filemtime ($file) >= time ()) {return file_get_contents ($file);            } else {@unlink ($file);            Ob_start ();        return false;  }}/** * Delete the specified ID cache * @param string $id Cache ID */Public Function remove ($id) {$this->_cacheid        = $id; Delete the data cache $file = $this->getoption (' Cache_dir ') of the attached condition. $this->getoption (' Cache_prefix ').        $this->_cacheid; @unLink ($file); Delete the output cache $file = $this->getoption (' Page_dir ') of the attached condition. $this->getoption (' Cache_prefix ').        $this->_cacheid;    @unlink ($file);        }/** * Save output cache and set cache expiration time * @param int $lifeTime Cache Expiration Time */Public function end ($lifeTime = null) {           if (null!== $lifeTime) $this->setoption (' Life_time ', $lifeTime); $file = $this->getoption (' Page_dir '). $this->getoption (' Cache_prefix ').        $this->_cacheid;        $data = Ob_get_contents ();        Ob_end_clean ();        @file_put_contents ($file, $data);        @chmod ($file, 0777);    @touch ($file, Time () + $this->getoption (' life_time '));    /** * Clear Cache according to parameters * @param string $mode cache type, including (Cleaning_mode_all: All caches, Cleaning_mode_old: Expired cache) */        Public Function Clear ($mode = cleaning_mode_old) {$dirs = array (' Cache_dir ', ' page_dir '); foreach ($dirs as $value) {if (null! = $this->getoption ($value)) {$fIles = Scandir ($this->getoption ($value)); Switch ($mode) {case CLEANING_MODE_ALL:default:foreach ($f                        Iles as $val) {@unlink ($this->getoption ($value). $val);                    } break;                            Case CLEANING_MODE_OLD:default:foreach ($files as $val) { if (Filemtime ($this->getoption ($value). $val) < time ()) {@unlink ($this->ge Toption ($value).                             $val);                }} break; }}}}/** * Take temporary folder as cache folder * @return $dir Temp Folder path */Public Function Gettmpdir ()        {$tmpdir = array (); foreach (Array ($_env, $_server) as $tab) {foreach (Array (' TMPDIR ', ' TEMP ', ' TMP ', ' windir ', ' SystemRoot ') as $ Key) {                if (Isset ($tab [$key])) {if ($key = = ' windir ') or ($key = = ' SystemRoot ')) { $dir = Realpath ($tab [$key].                    ' \\temp ');                    } else {$dir = Realpath ($tab [$key]);                    } if ($this->_isgoodtmpdir ($dir)) {return $dir;        }}}} $upload = Ini_get (' Upload_tmp_dir ');            if ($upload) {$dir = Realpath ($upload);            if ($this->_isgoodtmpdir ($dir)) {return $dir;            }} if (Function_exists (' Sys_get_temp_dir ')) {$dir = Sys_get_temp_dir ();            if ($this->_isgoodtmpdir ($dir)) {return $dir;        }}//By attempting to create a temporary file to detect $tempFile = Tempnam (MD5 (Uniqid (rand (), TRUE), ");            if ($tempFile) {$dir = Realpath (dirname ($tempFile)); Unlink ($tempFile);            if ($this->_isgoodtmpdir ($dir)) {return $dir;        }} if ($this->_isgoodtmpdir ('/tmp ')) {return '/tmp ';        } if ($this->_isgoodtmpdir (' \\temp ')) {return ' \\temp ';    } throw new Exception (' cannot determine temporary directory, please manually specify Cache_dir ', E_user_error);     }/** * Verify that the given temp directory is readable and writable * * @param string $dir temporary folder path * @return Boolean true or False if the temporary folder path is readable or writable                */protected function _isgoodtmpdir ($dir) {if (is_readable ($dir)) {if (is_writable ($dir)) {            return true;    }} return false; }}//endclass

The above describes their own PHP cache class, including PHP, their own aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

