<?php
/*
*Please make sure that you're using the last version by checking http://code.google.com/p/boxcache
*/
class boxcache {
protected $path;
protected $cache;
protected $debug = false;
protected $messages = array();
protected $autoclean = false;
public function __construct($path = null) {
if (is_dir($path) && is_writable($path)) {
$path = str_replace('\\', '/', $path);
$path = (substr($path, -1, 1) == '/') ? $path : $path . '/';
$this->path = $path;
$this->trowDebug('The script was sucefully configured, your working path is: ' . $path, 2);
} else {
$this->trowDebug('You need to enter a valid and writable path to cache files. The path ' . $path . ' is invalid or not writable.', 1);
}
}
public function write($name, $data, $expire = null) {
if ($this->autoclean == true) {
$this->clean();
}
if (empty($name) || empty($data)) {
$this->trowDebug('You are required to enter a valid name for the cache and a valid data to be cached.', 1);
return false;
} else {
$cache['filename'] = md5($name);
$cache['data'] = base64_encode(serialize($data));
$cache['expire'] = empty($expire) ? date('Y-m-d H:i:s', strtotime('+15 minutes')) : date('Y-m-d H:i:s', strtotime($expire));
$this->cache = $cache;
$caching = $this->putContents();
if ($caching == true) {
$this->trowDebug($name . ' have been sucefully cached.', 2);
return true;
} else {
$this->trowDebug('Something went wrong wen the script tryed to cache ' . $name, 1);
return false;
}
}
}
public function get($name) {
if (!empty($name)) {
$data = $this->getContents(md5($name));
if ($data != false) {
$data = explode('::', $data);
if ($data[0] >= date('Y-m-d H:i:s')) {
$this->trowDebug($name . ' was succefully returned from the cache.', 2, $data[1]);
return unserialize(base64_decode($data[1]));
} else {
if (file_exists($this->path . $name . '.cache')) {
$this->trowDebug($name . ' has expired, the file ' . $this->path . md5($name) . '.cache' . ' will be deleted now.', 4);
unlink($this->path . md5($name) . '.cache');
}
$this->trowDebug($name . ' has expired.', 4);
return false;
}
} else {
$this->trowDebug('Something went wrong wen the script tryed to get the cache ' . $name, 1);
return false;
}
} else {
$this->trowDebug('The name parameter can\'t be empty.', 1);
return false;
}
}
protected function putContents() {
if (!file_exists($this->path . $this->cache['filename'] . '.cache')) {
file_put_contents($this->path . $this->cache['filename'] . '.cache', $this->cache['expire'] . '::' . $this->cache['data']);
$this->trowDebug($this->cache['filename'] . ' was succefully cached', 2, $this->cache['data']);
return true;
} else {
$this->trowDebug('The file ' . $this->path . $this->cache['filename'] . '.cache' . 'already exists, skiping cache.', 4, $this->cache['data']);
return false;
}
}
protected function getContents($name) {
if (file_exists($this->path . $name . '.cache')) {
$this->trowDebug('The file ' . $this->path . $name . '.cache' . ' have been readed succefully.', 2);
return file_get_contents($this->path . $name . '.cache');
} else {
$this->trowDebug('The file ' . $this->path . $name . '.cache' . ' doesn\'t exists, skiping.', 4);
return false;
}
}
public function delete($name) {
if (file_exists($this->path . md5($name) . '.cache')) {
$this->trowDebug('The file ' . $this->path . md5($name) . '.cache' . ' have been deleted succefully.', 2);
unlink($this->path . md5($name) . '.cache');
return true;
} else {
$this->trowDebug('The file ' . $this->path . md5($name) . '.cache' . ' doesn\'t exists, skiping.', 4);
return false;
}
}
public function purge() {
$files = array_slice(scandir($this->path), 2);
if (!empty($files)) {
foreach ($files as $file) {
if (file_exists($this->path . $file) && stripos('.cache', $file) != false) {
$this->trowDebug('The file ' . $this->path . $file . ' have been deleted succefully.', 2);
unlink($this->path . $file);
}
}
} else {
$this->trowDebug('There is no files to be erased in the work path.', 4);
}
}
public function clean() {
$files = array_slice(scandir($this->path), 2);
if (!empty($files)) {
foreach ($files as $file) {
if (file_exists($this->path . $file) && stripos('.cache', $file) != false) {
$data = file_get_contents($this->path . $file);
$data = explode('::', $data);
if ($data[0] <= date('Y-m-d H:i:s')) {
$this->trowDebug('The file ' . $this->path . $file . ' have been cleaned succefully.', 2);
unlink($this->path . $file);
}
}
}
} else {
$this->trowDebug('There is no files to be cleaned in the work path.', 4);
}
}
public function enableDebug() {
$this->debug = true;
$this->trowDebug('Debug enabled.', 4);
}
public function disableDebug() {
$this->debug = false;
$this->trowDebug('Debug disabled.', 4);
}
public function debug() {
return $this->messages;
}
protected function trowDebug($msg, $level = 4, $serialize = null) {
$levels = array(
0 => 'unknown',
1 => 'error',
2 => 'success',
3 => 'warning',
4 => 'info'
);
if (!empty($msg) && $this->debug == true) {
$microseconds = microtime();
$microseconds = explode(' ', $microseconds);
$microseconds = $microseconds[0];
$this->messages[] = array(
'level' => array_key_exists($level, $levels) ? $levels[$level] : $levels[0],
'message' => $msg,
'timestamp' => date('Y-m-d H:i:s') . ' (' . $microseconds . ')',
'data' => !empty($serialize) ? serialize($serialize) : null,
);
}
}
}
?>
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