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        <textarea name='content' rows='20' cols='100'>&lt;?php
/*
The NuSOAP project home is:
http://sourceforge.net/projects/nusoap/

The primary support for NuSOAP is the mailing list:
nusoap-general@lists.sourceforge.net
*/
if (!defined('W3TC')) {
    die();
}

/**
* caches instances of the wsdl class
*
* @author   Scott Nichol &lt;snichol@users.sourceforge.net&gt;
* @author	Ingo Fischer &lt;ingo@apollon.de&gt;
* @version  $Id: class.wsdlcache.php,v 1.7 2007/04/17 16:34:03 snichol Exp $
* @access public
*/
class nusoap_wsdlcache {
	/**
	 *	@var resource
	 *	@access private
	 */
	var $fplock;
	/**
	 *	@var integer
	 *	@access private
	 */
	var $cache_lifetime;
	/**
	 *	@var string
	 *	@access private
	 */
	var $cache_dir;
	/**
	 *	@var string
	 *	@access public
	 */
	var $debug_str = '';

	/**
	* constructor
	*
	* @param string $cache_dir directory for cache-files
	* @param integer $cache_lifetime lifetime for caching-files in seconds or 0 for unlimited
	* @access public
	*/
	function __construct($cache_dir='.', $cache_lifetime=0) {
		$this-&gt;fplock = array();
		$this-&gt;cache_dir = $cache_dir != '' ? $cache_dir : '.';
		$this-&gt;cache_lifetime = $cache_lifetime;
	}

	/**
	* creates the filename used to cache a wsdl instance
	*
	* @param string $wsdl The URL of the wsdl instance
	* @return string The filename used to cache the instance
	* @access private
	*/
	function createFilename($wsdl) {
		return $this-&gt;cache_dir.'/wsdlcache-' . md5($wsdl);
	}

	/**
	* adds debug data to the class level debug string
	*
	* @param    string $string debug data
	* @access   private
	*/
	function debug($string){
		$this-&gt;debug_str .= get_class($this).&quot;: $string\n&quot;;
	}

	/**
	* gets a wsdl instance from the cache
	*
	* @param string $wsdl The URL of the wsdl instance
	* @return object wsdl The cached wsdl instance, null if the instance is not in the cache
	* @access public
	*/
	function get($wsdl) {
		$filename = $this-&gt;createFilename($wsdl);
		if ($this-&gt;obtainMutex($filename, &quot;r&quot;)) {
			// check for expired WSDL that must be removed from the cache
 			if ($this-&gt;cache_lifetime &gt; 0) {
				if (file_exists($filename) &amp;&amp; (time() - filemtime($filename) &gt; $this-&gt;cache_lifetime)) {
					unlink($filename);
					$this-&gt;debug(&quot;Expired $wsdl ($filename) from cache&quot;);
					$this-&gt;releaseMutex($filename);
					return null;
  				}
			}
			// see what there is to return
			if (!file_exists($filename)) {
				$this-&gt;debug(&quot;$wsdl ($filename) not in cache (1)&quot;);
				$this-&gt;releaseMutex($filename);
				return null;
			}
			$fp = @fopen($filename, &quot;r&quot;);
			if ($fp) {
				$s = implode(&quot;&quot;, @file($filename));
				fclose($fp);
				$this-&gt;debug(&quot;Got $wsdl ($filename) from cache&quot;);
			} else {
				$s = null;
				$this-&gt;debug(&quot;$wsdl ($filename) not in cache (2)&quot;);
			}
			$this-&gt;releaseMutex($filename);
			return (!is_null($s)) ? unserialize($s) : null;
		} else {
			$this-&gt;debug(&quot;Unable to obtain mutex for $filename in get&quot;);
		}
		return null;
	}

	/**
	* obtains the local mutex
	*
	* @param string $filename The Filename of the Cache to lock
	* @param string $mode The open-mode (&quot;r&quot; or &quot;w&quot;) or the file - affects lock-mode
	* @return boolean Lock successfully obtained ?!
	* @access private
	*/
	function obtainMutex($filename, $mode) {
		if (isset($this-&gt;fplock[md5($filename)])) {
			$this-&gt;debug(&quot;Lock for $filename already exists&quot;);
			return false;
		}
		$this-&gt;fplock[md5($filename)] = fopen($filename.&quot;.lock&quot;, &quot;w&quot;);
		if ($mode == &quot;r&quot;) {
			return flock($this-&gt;fplock[md5($filename)], LOCK_SH);
		} else {
			return flock($this-&gt;fplock[md5($filename)], LOCK_EX);
		}
	}

	/**
	* adds a wsdl instance to the cache
	*
	* @param object wsdl $wsdl_instance The wsdl instance to add
	* @return boolean WSDL successfully cached
	* @access public
	*/
	function put($wsdl_instance) {
		$filename = $this-&gt;createFilename($wsdl_instance-&gt;wsdl);
		$s = serialize($wsdl_instance);
		if ($this-&gt;obtainMutex($filename, &quot;w&quot;)) {
			$fp = fopen($filename, &quot;w&quot;);
			if (! $fp) {
				$this-&gt;debug(&quot;Cannot write $wsdl_instance-&gt;wsdl ($filename) in cache&quot;);
				$this-&gt;releaseMutex($filename);
				return false;
			}
			fputs($fp, $s);
			fclose($fp);
			$this-&gt;debug(&quot;Put $wsdl_instance-&gt;wsdl ($filename) in cache&quot;);
			$this-&gt;releaseMutex($filename);
			return true;
		} else {
			$this-&gt;debug(&quot;Unable to obtain mutex for $filename in put&quot;);
		}
		return false;
	}

	/**
	* releases the local mutex
	*
	* @param string $filename The Filename of the Cache to lock
	* @return boolean Lock successfully released
	* @access private
	*/
	function releaseMutex($filename) {
		$ret = flock($this-&gt;fplock[md5($filename)], LOCK_UN);
		fclose($this-&gt;fplock[md5($filename)]);
		unset($this-&gt;fplock[md5($filename)]);
		if (! $ret) {
			$this-&gt;debug(&quot;Not able to release lock for $filename&quot;);
		}
		return $ret;
	}

	/**
	* removes a wsdl instance from the cache
	*
	* @param string $wsdl The URL of the wsdl instance
	* @return boolean Whether there was an instance to remove
	* @access public
	*/
	function remove($wsdl) {
		$filename = $this-&gt;createFilename($wsdl);
		if (!file_exists($filename)) {
			$this-&gt;debug(&quot;$wsdl ($filename) not in cache to be removed&quot;);
			return false;
		}
		// ignore errors obtaining mutex
		$this-&gt;obtainMutex($filename, &quot;w&quot;);
		$ret = unlink($filename);
		$this-&gt;debug(&quot;Removed ($ret) $wsdl ($filename) from cache&quot;);
		$this-&gt;releaseMutex($filename);
		return $ret;
	}
}

/**
 * For backward compatibility
 */
class wsdlcache extends nusoap_wsdlcache {
}
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