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<?php
/**
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*/
namespace Piwik\Plugins\Diagnostics\Diagnostic;
use Piwik\Translation\Translator;
/**
* Check the enabled PHP functions.
*/
class PhpFunctionsCheck implements Diagnostic
{
/**
* @var Translator
*/
private $translator;
public function __construct(Translator $translator)
{
$this->translator = $translator;
}
public function execute()
{
$label = $this->translator->translate('Installation_SystemCheckFunctions');
$result = new DiagnosticResult($label);
foreach ($this->getRequiredFunctions() as $function) {
if (! self::functionExists($function)) {
$status = DiagnosticResult::STATUS_ERROR;
$comment = sprintf(
'%s <br/><br/><em>%s</em><br/><em>%s</em><br/>',
$function,
$this->getHelpMessage($function),
$this->translator->translate('Installation_RestartWebServer')
);
} else {
$status = DiagnosticResult::STATUS_OK;
$comment = $function;
}
$result->addItem(new DiagnosticResultItem($status, $comment));
}
return array($result);
}
/**
* @return string[]
*/
private function getRequiredFunctions()
{
return array(
'debug_backtrace',
'create_function',
'eval',
'hash',
'gzcompress',
'gzuncompress',
'pack',
);
}
/**
* Tests if a function exists. Also handles the case where a function is disabled via Suhosin.
*
* @param string $function
* @return bool
*/
public static function functionExists($function)
{
// eval() is a language construct
if ($function == 'eval') {
// does not check suhosin.executor.eval.whitelist (or blacklist)
if (extension_loaded('suhosin')) {
return @ini_get("suhosin.executor.disable_eval") != "1";
}
return true;
}
$exists = function_exists($function);
if (extension_loaded('suhosin')) {
$blacklist = @ini_get("suhosin.executor.func.blacklist");
if (!empty($blacklist)) {
$blacklistFunctions = array_map('strtolower', array_map('trim', explode(',', $blacklist)));
return $exists && !in_array($function, $blacklistFunctions);
}
}
return $exists;
}
private function getHelpMessage($missingFunction)
{
$messages = array(
'debug_backtrace' => 'Installation_SystemCheckDebugBacktraceHelp',
'create_function' => 'Installation_SystemCheckCreateFunctionHelp',
'eval' => 'Installation_SystemCheckEvalHelp',
'hash' => 'Installation_SystemCheckHashHelp',
'gzcompress' => 'Installation_SystemCheckGzcompressHelp',
'gzuncompress' => 'Installation_SystemCheckGzuncompressHelp',
'pack' => 'Installation_SystemCheckPackHelp',
);
return $this->translator->translate($messages[$missingFunction]);
}
}
|
