interface/modules/zend_modules/library/Zend/Log/Filter/Regex.php

   1 <?php
   2 /**
   3  * Zend Framework (http://framework.zend.com/)
   4  *
   5  * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6  * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
   7  * @license   http://framework.zend.com/license/new-bsd New BSD License
   8  */
   9
  10 namespace Zend\Log\Filter;
  11
  12 use Traversable;
  13 use Zend\Log\Exception;
  14 use Zend\Stdlib\ErrorHandler;
  15
  16 class Regex implements FilterInterface
  17 {
  18     /**
  19      * Regex to match
  20      *
  21      * @var string
  22      */
  23     protected $regex;
  24
  25     /**
  26      * Filter out any log messages not matching the pattern
  27      *
  28      * @param string|array|Traversable $regex Regular expression to test the log message
  29      * @return Regex
  30      * @throws Exception\InvalidArgumentException
  31      */
  32     public function __construct($regex)
  33     {
  34         if ($regex instanceof Traversable) {
  35             $regex = iterator_to_array($regex);
  36         }
  37         if (is_array($regex)) {
  38             $regex = isset($regex['regex']) ? $regex['regex'] : null;
  39         }
  40         ErrorHandler::start(E_WARNING);
  41         $result = preg_match($regex, '');
  42         $error  = ErrorHandler::stop();
  43         if ($result === false) {
  44             throw new Exception\InvalidArgumentException(sprintf(
  45                 'Invalid regular expression "%s"',
  46                 $regex
  47             ), 0, $error);
  48         }
  49         $this->regex = $regex;
  50     }
  51
  52     /**
  53      * Returns TRUE to accept the message, FALSE to block it.
  54      *
  55      * @param array $event event data
  56      * @return bool accepted?
  57      */
  58     public function filter(array $event)
  59     {
  60         $message = $event['message'];
  61         if (is_array($event['message'])) {
  62             $message = var_export($message, TRUE);
  63         }
  64         return preg_match($this->regex, $message) > 0;
  65     }
  66 }