我正在寻找一种方法来gzip我的html的缓存副本，也服务器缓存的版本给用户，这是可能的吗?我到目前为止有这个…
//开头
$filename = md5($_SERVER['REQUEST_URI']);
$cache_file = $_SERVER['DOCUMENT_ROOT'].'/pagecache/' . $filename . '.htm';
$cache_time = 86400; // 24 hours
if (file_exists($cache_file) &&
time() - $cache_time < filemtime($cache_file)) {
include($cache_file);
exit;
}
ob_start();
//在页脚
$cached = fopen($cache_file, 'w');
fwrite($cached, ob_get_contents());
fclose($cached);
ob_end_flush();
任何指导将不胜感激。
您不需要压缩每个文件，在php.ini中启用输出压缩，它会自动完成
zlib.output_compression = On
或以
开始输出缓冲区ob_start('ob_gzhandler');
现在，如果你的缓存的目的是因为speed和storage space，那么不要使用文件系统，只使用Memcached ..它支持内置压缩
$memcache = new Memcache();
$memcache->addserver("127.0.0.1");
$memcache->add($filename, ob_get_contents(), MEMCACHE_COMPRESSED);
这是一个简单的脚本来管理文件缓存和memcache…你可以很容易地扩展到其他类型的存储，如mongoDB或redis
使用文件系统
$storage = new Fcache();
$storage->setDir(__DIR__ . "/cache"); // cache directory
使用Memcache
$storage = new Mcache();
$storage->addserver("127.0.0.1"); // Add Server
你的脚本
$cache = new SimpleCache($storage);
$cache->setTime(5); // 5 sec for demo
if ($data = $cache->get()) {
echo "Cached Copy <br />'n";
echo $data;
} else {
ob_start();
while(@$i ++ < 10) {
echo mt_rand();
}
$cache->set(ob_get_contents());
ob_end_flush();
}
您可以看到$storage存储可以是file或memcache，这里是使用的类
SimpleCache
class SimpleCache {
private $storage;
function __construct(CacheStorage $storage) {
$this->storage = $storage;
}
public function setTime($time) {
$this->storage->setTime($time);
}
function get() {
$name = sha1($_SERVER['REQUEST_URI']) . ".cache";
return $this->storage->read($name);
}
function set($content) {
$name = sha1($_SERVER['REQUEST_URI']) . ".cache";
$this->storage->write($name, $content);
}
}
interface CacheStorage {
public function setTime($time);
public function read($file);
public function write($file, $data);
}
// Using Memcache
class Mcache extends Memcache implements CacheStorage {
private $time = 86400;
public function setTime($time) {
$this->time = $time;
}
public function read($name) {
return $this->get($name);
}
public function write($name, $data) {
return $this->add($name, $data, MEMCACHE_COMPRESSED, $this->time);
}
}
// Using Files System
class Fcache implements CacheStorage {
private $dir;
private $time = 86400;
public function __construct($dir = "cache") {
$this->setDir($dir);
}
public function setDir($dir) {
$this->dir = $dir;
if (! is_dir($this->dir) and ! mkdir($this->dir))
throw new Exception("Invalid Directory");
$this->dir = $dir;
}
public function setTime($time) {
$this->time = $time;
}
public function read($name) {
$name = $this->dir . "/" . $name;
if (! is_file($name))
return false;
if (time() - filemtime($name) > $this->time)
return false;
$zd = gzopen($name, "r");
$zr = "";
while(! feof($zd)) {
$zr .= gzread($zd, 1024);
}
gzclose($zd);
return $zr;
}
public function write($name, $data) {
$name = $this->dir . "/" . $name;
touch($name);
$gz = gzopen($name, "w9");
gzwrite($gz, $data);
gzclose($gz);
return true;
}
}
这个类会最小化和gz HTML输出
cleaner.php:
<?php
class Cleaner{
static function Clean($html){
$html=preg_replace_callback("~<script(.*?)>(.*?)</script>~si",function($m){
$m[2]=preg_replace("~//(.*?)'n~si"," ", " ".$m[2]." ");
return "<script ".$m[1].">".$m[2]."</script>";
}, $html);
$search = array(
"/ +/" => " ",
"/<!–'{(.*?)'}–>|<!–(.*?)–>|['t'r'n]|<!–|–>|'/'/ <!–|'/'/ –>|<!'[CDATA'[|'/'/ ']']>|']']>|'/'/']']>|'/'/<!'[CDATA'[/" => "");
//$html = preg_replace(array_keys($search), array_values($search), $html);
$search = array(
"/'/'*(.*?)'*'/|['t'r'n]/s" => "",
"/ +'{ +|'{ +| +'{/" => "{",
"/ +'} +|'} +| +'}/" => "}",
"/ +: +|: +| +:/" => ":",
"/ +; +|; +| +;/" => ";",
"/ +, +|, +| +,/" => ","
);
$html = preg_replace(array_keys($search), array_values($search), $html);
preg_match_all('!(<(?:code|pre|script).*>[^<]+</(?:code|pre|script)>)!',$html,$pre);
$html = preg_replace('!<(?:code|pre).*>[^<]+</(?:code|pre)>!', '#pre#', $html);
$html = preg_replace('#<!–[^'[].+–>#', '', $html);
$html = preg_replace('/['r'n't]+/', ' ', $html);
$html = preg_replace('/>['s]+</', '><', $html);
$html = preg_replace('/'s+/', ' ', $html);
if (!empty($pre[0])) {
foreach ($pre[0] as $tag) {
$html = preg_replace('!#pre#!', $tag, $html,1);
}
}
return($html);
}
static function Cleaning($html) {
//put cache checker here
$html=self::Clean($html);//if you didn't want to minify commented this line
if (substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')){
$html= "'x1f'x8b'x08'x00'x00'x00'x00'x00".
substr(gzcompress($html, 9), 0, - 4). // substr -4 isn't needed
pack('V', crc32($html)). // crc32 and
pack('V', strlen($html)); // size are ignored by all the browsers i have tested
header("Content-Encoding: gzip");
header('Content-Length: ' . strlen($html));
}
//you can save your cache
return($html);
}
}?>
在PHP文件中的使用示例
<?php require_once(dirname(__FILE__)."/cleaner.php");
@ob_start(function($m){return Cleaner::Cleaning($m);});?>
//begin of php file
//end of php file
<?php
while (@ob_end_flush());?>