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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Log\Filter;
use Traversable;
use Zend\Log\Exception;
use Zend\Stdlib\ErrorHandler;
class Regex implements FilterInterface
{
/**
* Regex to match
*
* @var string
*/
protected $regex;
/**
* Filter out any log messages not matching the pattern
*
* @param string|array|Traversable $regex Regular expression to test the log message
* @return Regex
* @throws Exception\InvalidArgumentException
*/
public function __construct($regex)
{
if ($regex instanceof Traversable) {
$regex = iterator_to_array($regex);
}
if (is_array($regex)) {
$regex = isset($regex['regex']) ? $regex['regex'] : null;
}
ErrorHandler::start(E_WARNING);
$result = preg_match($regex, '');
$error = ErrorHandler::stop();
if ($result === false) {
throw new Exception\InvalidArgumentException(sprintf(
'Invalid regular expression "%s"',
$regex
), 0, $error);
}
$this->regex = $regex;
}
/**
* Returns TRUE to accept the message, FALSE to block it.
*
* @param array $event event data
* @return bool accepted?
*/
public function filter(array $event)
{
$message = $event['message'];
if (is_array($event['message'])) {
$message = var_export($message, true);
}
return preg_match($this->regex, $message) > 0;
}
}
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