<?php
$_cachetime = 3600;
$_cacheroot = '/path/to/cache/';
function cacheget($key) {
	global $_cachetime, $_cacheroot;
	$_cachename = sprintf('%x', crc32($key));
	$_cachefolder = $_cacheroot.substr($_cachename,0,2).'/';
	$_cachefile = $_cachefolder.$_cachename;
	if (file_exists($_cachefile) && (filemtime($_cachefile) > time() - $_cachetime || 
		(file_exists($_cachefile.'.lock') && time() - filemtime($_cachefile.'.lock') < 120))) {
		return unserialize(file_get_contents($_cachefile));
	}
	return false;
}
function cachelock($key) {
	global $_cacheroot;
	$_cachename = sprintf("%x", crc32($key));
	$_cachefolder = $_cacheroot.substr($_cachename,0,2).'/';
	$_cachefile = $_cachefolder.$_cachename;
	umask(0);
	if (!file_exists($_cachefolder)) {
		mkdir($_cachefolder,0777);
	}
	touch($_cachefile.'.lock');
}
function cacheset($key, $value) {
	global $_cacheroot;
	$_cachename = sprintf('%x', crc32($key));
	$_cachefolder = $_cacheroot.substr($_cachename,0,2).'/';
	$_cachefile = $_cachefolder.$_cachename;
	umask(0);
	if (!file_exists($_cachefolder)) {
		mkdir($_cachefolder,0777);
	}
	if ($_h = fopen($_cachefile, 'w')) {
		fwrite($_h, serialize($value));
		fclose($_h);
		unlink($_cachefile.'.lock');
	}
}
?>

<?php $_cachetime = 3600; $_cacheroot = '/path/to/cache/'; function cacheget($key) { global $_cachetime, $_cacheroot; $_cachename = sprintf('%x', crc32($key)); $_cachefolder = $_cacheroot.substr($_cachename,0,2).'/'; $_cachefile = $_cachefolder.$_cachename; if (file_exists($_cachefile) && (filemtime($_cachefile) > time() - $_cachetime || (file_exists($_cachefile.'.lock') && time() - filemtime($_cachefile.'.lock') < 120))) { return unserialize(file_get_contents($_cachefile)); } return false; } function cachelock($key) { global $_cacheroot; $_cachename = sprintf("%x", crc32($key)); $_cachefolder = $_cacheroot.substr($_cachename,0,2).'/'; $_cachefile = $_cachefolder.$_cachename; umask(0); if (!file_exists($_cachefolder)) { mkdir($_cachefolder,0777); } touch($_cachefile.'.lock'); } function cacheset($key, $value) { global $_cacheroot; $_cachename = sprintf('%x', crc32($key)); $_cachefolder = $_cacheroot.substr($_cachename,0,2).'/'; $_cachefile = $_cachefolder.$_cachename; umask(0); if (!file_exists($_cachefolder)) { mkdir($_cachefolder,0777); } if ($_h = fopen($_cachefile, 'w')) { fwrite($_h, serialize($value)); fclose($_h); unlink($_cachefile.'.lock'); } } ?>

<?php
$query = 'SELECT * FROM table';
$sql = mysql_query($query);
while ($row = mysql_fetch_assoc($sql)) {
        var_dump($row);
}
?>

<?php $query = 'SELECT * FROM table'; $sql = mysql_query($query); while ($row = mysql_fetch_assoc($sql)) { var_dump($row); } ?>

<?php
$query = 'SELECT * FROM table';
if (!$rows = cacheget($query)) {
        cachelock($query);
        $sql = mysql_query($query);
        $rows = array();
        while ($row = mysql_fetch_assoc($sql))
                $rows[] = $row;
        cacheset($query, $rows);
}
foreach($rows as $row) {
        var_dump($row);
}
?>

<?php $query = 'SELECT * FROM table'; if (!$rows = cacheget($query)) { cachelock($query); $sql = mysql_query($query); $rows = array(); while ($row = mysql_fetch_assoc($sql)) $rows[] = $row; cacheset($query, $rows); } foreach($rows as $row) { var_dump($row); } ?>

<?php
$_cachetime = 43200;
$_info = parse_url($_SERVER["REQUEST_URI"]);
if (!isset($_info['query'])) $_info['query'] = '';
$_path = end(explode('/', $_info['path']));
$_info['query'] = str_replace('&nocache', '', $_info['query']);
$_info['query'] = str_replace('nocache&', '', $_info['query']);
$_info['query'] = str_replace('nocache', '', $_info['query']);
$_cachename = sprintf("%x", crc32($_path."?".$_info['query']));
$_cachefolder = '/path/to/cache/'.substr($_cachename,0,2).'/';
$_cachefile = $_cachefolder.$_cachename;
if ($_SERVER["REQUEST_URI"] != '/' && $_SERVER["REQUEST_METHOD"] == 'GET' &&
    !isset($_GET["nocache"]) &&
    file_exists($_cachefile) && filemtime($_cachefile) > time() - $_cachetime) {
        readfile($_cachefile);
        exit();
}
function fetch_cache($_buffer) {
        global $_cachefile, $_cachefolder;
        umask( 0);
        if (!file_exists($_cachefolder))
                mkdir($_cachefolder,0777, true);
        if ($_h = fopen($_cachefile, "w")) {
                fwrite($_h, $_buffer);
                fclose($_h);
        }
        return $_buffer;
}
ob_start('fetch_cache');
?>

<?php $_cachetime = 43200; $_info = parse_url($_SERVER["REQUEST_URI"]); if (!isset($_info['query'])) $_info['query'] = ''; $_path = end(explode('/', $_info['path'])); $_info['query'] = str_replace('&nocache', '', $_info['query']); $_info['query'] = str_replace('nocache&', '', $_info['query']); $_info['query'] = str_replace('nocache', '', $_info['query']); $_cachename = sprintf("%x", crc32($_path."?".$_info['query'])); $_cachefolder = '/path/to/cache/'.substr($_cachename,0,2).'/'; $_cachefile = $_cachefolder.$_cachename; if ($_SERVER["REQUEST_URI"] != '/' && $_SERVER["REQUEST_METHOD"] == 'GET' && !isset($_GET["nocache"]) && file_exists($_cachefile) && filemtime($_cachefile) > time() - $_cachetime) { readfile($_cachefile); exit(); } function fetch_cache($_buffer) { global $_cachefile, $_cachefolder; umask( 0); if (!file_exists($_cachefolder)) mkdir($_cachefolder,0777, true); if ($_h = fopen($_cachefile, "w")) { fwrite($_h, $_buffer); fclose($_h); } return $_buffer; } ob_start('fetch_cache'); ?>

<?php
ob_end_flush();
?>

<?php ob_end_flush(); ?>