PHP程序缓存之文件缓存处理方式

在开发程序过程中，缓存的设置大大提升程序效率，减小数据库负载。

基本配置缓存和常规配置缓存

基本配置缓存在项目开发中类似这样子的格式：

文件：config.php

$CFG['database'] = 'mysql';$CFG['pconnect'] = '0';$CFG['db_host'] = 'localhost';$CFG['db_name'] = 'appcom';$CFG['db_user'] = 'root';$CFG['db_pass'] = '123456';$CFG['db_charset'] = 'utf8';

常规配置缓存类似这样的：例如文件x.php

return array ('a'=>'','b'=>'','c'=>'','d'=>'','aa'=>array('x'=>'','y'=>,'z'=>''),'bb'=>array('x'=>'','y'=>,'z'=>''),'cc'=>array('x'=>'','y'=>,'z'=>''));

缓存配置程序代码：

基本配置的更新：

$tmp = file_get('config.inc.php');foreach($setting as $k=>$v) {            $tmp = preg_replace("/[$]CFG\['$k'\]\s*\=\s*[\"'].*?[\"']/is", "\$CFG['$k'] = '$v'", $tmp);

常规配置的更新:例如文件名为y.php

cache_write('y.php', $setting);function cache_write($file, $string, $dir = '') {    if(is_array($string)) $string = "
     ";    $file = $file;    $strlen = file_put($file, $string);    return $strlen;}function strip_nr($string, $js = false) {    $string =  str_replace(array(chr(13), chr(10), "\n", "\r", "\t", '  '),array('', '', '', '', '', ''), $string);    if($js) $string = str_replace("'", "\'", $string);    return $string;}function file_put($filename, $data) {$phpServer=strpos(strtoupper(PHP_OS), 'WIN') !== false ? true: false;    dir_create(dirname($filename));        if(@$fp = fopen($filename, 'wb')) {        flock($fp, LOCK_EX);        $len = fwrite($fp, $data);        flock($fp, LOCK_UN);        fclose($fp);        if($phpServer) @chmod($filename, $phpServer);        return $len;    } else {        return false;    }}function file_get($filename) {    return @file_get_contents($filename);}