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MySQLDumper/library/Msd/Config/Dynamic.php

183 Zeilen
5 KiB
PHP

2012-08-04 10:40:48 +00:00
<?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage Config
* @version SVN: $Rev$
* @author $Author$
*/
/**
* Class for dynamic (session lifetime) configuration settings.
*
* @package MySQLDumper
* @subpackage Config
*/
class Msd_Config_Dynamic
{
/**
* Instance of Zend_Session_Namespace for session storage.
*
* @var Zend_Session_Namespace
*/
private $_namespace = null;
/**
* Class constructor.
*
* @param string $sessionNsName Name of the session namespace.
*
* @return Msd_Config_Dynamic
*/
public function __construct($sessionNsName = 'Dynamic')
{
$this->_namespace = new Zend_Session_Namespace($sessionNsName);
$this->getDynamicValues();
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}
/**
* Retrieves the value of a parameter.
*
* @param string $name Name of the parameter.
* @param mixed $default Default value to return, if param isn't set.
*
* @return mixed
*/
public function getParam($name, $default = null)
{
if (isset($this->_namespace->$name)) {
return $this->_namespace->$name;
}
return $default;
}
/**
* Sets a value for the given parameter.
*
* @param string $name Name of the parameter.
* @param mixed $value Value for the parameter.
*
* @return void
*/
public function setParam($name, $value)
{
$this->_namespace->$name = $value;
}
/**
* Read dynamic PHP config values
*
* @return Zend_Config
*/
public function getDynamicValues ()
{
$this->setParam('compression', self::_hasZlib());
$this->setParam('phpExtensions', str_replace(',', ', ', implode(', ', get_loaded_extensions())));
$phpRam = $this->_getPhpRam();
$this->setParam('phpRam', $phpRam);
$this->setParam('memoryLimit', round($phpRam * 1024 * 1024 * 0.9, 0));
$this->setParam('sendmailCall', $this->_getConfigSetting('sendmail_path'));
$this->setParam('safeMode', $this->_getConfigSetting('safe_mode', true));
$this->setParam('magicQuotesGpc', get_magic_quotes_gpc());
$disabledPhpFunctions = $this->_getConfigSetting('disable_functions');
$this->setParam('disabledPhpFunctions', str_replace(',', ', ', $disabledPhpFunctions));
$this->setParam('maxExecutionTime', $this->_getMaxExecutionTime());
$this->setParam('uploadMaxFilesize', $this->_getUploadMaxFilesize());
}
/**
* Read PHP's max_execution_time
*
* @return int
*/
private function _getMaxExecutionTime()
{
$maxExecutionTime =
$this->_getConfigSetting('max_execution_time', true);
if ($maxExecutionTime <= 5) {
// we didn't get the real value from the server - some deliver "-1"
$maxExecutionTime = 30;
} elseif ($maxExecutionTime > 30) {
// we don't use more than 30 seconds to avoid brower timeouts
$maxExecutionTime = 30;
}
return $maxExecutionTime;
}
/**
* Get PHP's upload_max_filesize
*
* @return int
*/
private function _getUploadMaxFilesize()
{
$uploadMaxFilesize = $this->_getConfigSetting('upload_max_filesize');
// Is value in Megabytes? If yes create output
if (strpos($uploadMaxFilesize, 'M')) {
$uploadMaxFilesize = str_replace('M', '', $uploadMaxFilesize);
$uploadMaxFilesize = trim($uploadMaxFilesize);
// re-calculate to Bytes
$uploadMaxFilesize *= 1024 * 1024;
}
return (int) $uploadMaxFilesize;;
}
/**
* Get PHP's ram size
*
* @return integer The memory limit in MB
*/
private function _getPhpRam()
{
$ram = $this->_getConfigSetting('memory_limit');
// we don't trust the value delivered by server config if < 16
if ($ram < 16) {
$ram = 16;
}
return $ram;
}
/**
* Detect if zlib is installed
*
* @return boolean
*/
private function _hasZlib()
{
$zlib = false;
$extensions = get_loaded_extensions();
if (in_array('zlib', $extensions)) {
$zlib = true;
};
return (boolean) $zlib;
}
/**
* Returns a PHP-Setting from ini
*
* First try to read via ini_get(), then fall back to get_cfg_var()
*
* @param string $varName The name of the setting to read
* @param bool $returnAsInt Whether to return value as integer
*
* @return mixed
*/
private function _getConfigSetting($varName, $returnAsInt = false)
{
$value = @ini_get($varName);
// fallback if ini_get doesn't work
if ($value == '' || $value === null) {
$value = @get_cfg_var($varName);
}
if ($returnAsInt) {
$value = (int) $value;
}
return $value;
}
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}