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   1  <?php
   2  /**
   3   * log4php is a PHP port of the log4j java logging package.
   4   * 
   5   * <p>This framework is based on log4j (see {@link http://jakarta.apache.org/log4j log4j} for details).</p>
   6   * <p>Design, strategies and part of the methods documentation are developed by log4j team 
   7   * (Ceki Gülcü as log4j project founder and 
   8   * {@link http://jakarta.apache.org/log4j/docs/contributors.html contributors}).</p>
   9   *
  10   * <p>PHP port, extensions and modifications by VxR. All rights reserved.<br>
  11   * For more information, please see {@link http://www.vxr.it/log4php/}.</p>
  12   *
  13   * <p>This software is published under the terms of the LGPL License
  14   * a copy of which has been included with this distribution in the LICENSE file.</p>
  15   * 
  16   * @package log4php
  17   * @subpackage helpers
  18   */
  19  
  20  /**
  21   * @ignore 
  22   */
  23  if (!defined('LOG4PHP_DIR')) define('LOG4PHP_DIR', dirname(__FILE__) . '/..');
  24   
  25  define('LOG4PHP_LOGGER_TRANSFORM_CDATA_START',          '<![CDATA[');
  26  define('LOG4PHP_LOGGER_TRANSFORM_CDATA_END',            ']]>');
  27  define('LOG4PHP_LOGGER_TRANSFORM_CDATA_PSEUDO_END',     ']]&gt;');
  28  define('LOG4PHP_LOGGER_TRANSFORM_CDATA_EMBEDDED_END',   
  29      LOG4PHP_LOGGER_TRANSFORM_CDATA_END .
  30      LOG4PHP_LOGGER_TRANSFORM_CDATA_PSEUDO_END .
  31      LOG4PHP_LOGGER_TRANSFORM_CDATA_START 
  32  );
  33  
  34  /**
  35   * Utility class for transforming strings.
  36   *
  37   * @log4j-class org.apache.log4j.helpers.Transform
  38   *
  39   * @author VxR <vxr@vxr.it>
  40   * @package log4php
  41   * @subpackage helpers
  42   * @since 0.7
  43   */
  44  class LoggerTransform {
  45  
  46      /**
  47      * This method takes a string which may contain HTML tags (ie,
  48      * &lt;b&gt;, &lt;table&gt;, etc) and replaces any '&lt;' and '&gt;'
  49      * characters with respective predefined entity references.
  50      *
  51      * @param string $input The text to be converted.
  52      * @return string The input string with the characters '&lt;' and '&gt;' replaced with
  53      *                &amp;lt; and &amp;gt; respectively.
  54      * @static  
  55      */
  56      function escapeTags($input)
  57      {
  58          //Check if the string is null or zero length -- if so, return
  59          //what was sent in.
  60  
  61          if(empty($input))
  62              return $input;
  63  
  64          //Use a StringBuffer in lieu of String concatenation -- it is
  65          //much more efficient this way.
  66  
  67          return htmlspecialchars($input, ENT_NOQUOTES);
  68      }
  69  
  70      /**
  71      * Ensures that embeded CDEnd strings (]]&gt;) are handled properly
  72      * within message, NDC and throwable tag text.
  73      *
  74      * @param string $buf    String holding the XML data to this point.  The
  75      *                       initial CDStart (<![CDATA[) and final CDEnd (]]>) 
  76      *                       of the CDATA section are the responsibility of 
  77      *                       the calling method.
  78      * @param string &str    The String that is inserted into an existing 
  79      *                       CDATA Section within buf.
  80      * @static  
  81      */
  82      function appendEscapingCDATA(&$buf, $str)
  83      {
  84          if(empty($str))
  85              return;
  86      
  87          $rStr = str_replace(
  88              LOG4PHP_LOGGER_TRANSFORM_CDATA_END,
  89              LOG4PHP_LOGGER_TRANSFORM_CDATA_EMBEDDED_END,
  90              $str
  91          );
  92          $buf .= $rStr;
  93      }
  94  }
  95  ?>