Viewing file:  SessionAnalyzer.php (4.79 KB) -rw-rw-rw-
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<?php
/**
* @package SPLIB
* @version $Id: SessionAnalyzer.php,v 1.1 2003/12/12 08:06:05 kevin Exp $
*/
/**
* Session Analyzer
* Examines serialized session data (as it appears on the filesystem
* or in a database) and builds objects into which it places the data
* stored in the session
* <code>
* $sa = new SessionAnalyzer();
* $sa->addSession($some_serialized_session_data);
* $sessionStore = $sa->fetch();
* </code>
* @package SPLIB
* @access public
*/
class SessionAnalyzer {
/**
* A list of sessions, their data held in SessionStore objects
* @var array
*/
var $sessions;
/**
* SessionAnalyzer constructor
* @param object instance of database connection
* @access public
*/
function SessionAnalyzer () {
$this->sessions = array();
}
/**
* Gathers the sessions into a local array for analysis
* @param string raw serialized session data to parse
* @return void
* @access public
*/
function addSession($rawData) {
$this->sessions[]=$this->parseSession($rawData);
}
/**
* Iteraters over the SessionStore array
* @return SessionStore
* @access public
*/
function fetch() {
$session=each($this->sessions);
if ( $session ) {
return $session['value'];
} else {
reset($this->sessions);
return false;
}
}
/**
* Converts serialized session data to an object
* Thanks to comment from Stefan at;<br />
* http://www.php.net/manual/en/function.session-decode.php
* @param string session data
* @return object stdClass
* @access public
*/
function parseSession ($rawData) {
if ( empty ($rawData) )
return null;
// replace values within quotes since
// there might be ; or {} within the quotes
// these would mess up the slicing in the next step
$replaceStr = array();
$replaceStrCount = 0; //index for the saved replacement strings
$replaceParts = explode('"',$rawData);
for ($i = 1; $i < count($replaceParts); $i=$i+2) {
$replaceStr[$replaceStrCount] = $replaceParts[$i];
$replaceParts[$i] = "repl_" . $replaceStrCount;
$replaceStrCount++;
}
$rawData = implode('"',$replaceParts);
$vars = array();
$varCount = 0;
$flag = true;
//slice the string using ; and {} as separators, but keep them
while ( $flag ) {
if (strpos($rawData,";") < strpos($rawData,"{")
|| (strpos($rawData,";") !== false
&& strpos($rawData,"{") === false )) {
$vars[$varCount] = substr($rawData,0,strpos($rawData,";")+1);
$rawData = substr($rawData,strpos($rawData,";")+1,strlen($rawData));
} else if (strpos($rawData,";") > strpos($rawData,"{")
|| (strpos($rawData,";") === false
&& strpos($rawData,"{") !== false )) {
$vars[$varCount] = substr($rawData,0,strpos($rawData,"}")+1);
$rawData = substr($rawData,strpos($rawData,"}")+1,strlen($rawData));
}
if (strpos($rawData,";") === false && strpos($rawData,"{") === false) {
$flag = false;
} else {
$varCount++;
}
}
//replace the quote substitutes with the real values
for ($i = 0; $i < count($vars);$i++) {
//break apart because there might be more
// than one string to replace
$varsParts = explode('"',$vars[$i]);
for ($j = 1; $j < count($varsParts); $j++) {
$k = count($replaceStr);
while ($k > -1) {
$pat = "repl_" . $k;
if (strpos($varsParts[$j],$pat) !== false) {
$varsParts[$j] = str_replace("repl_".$k,
$replaceStr[$k],
$varsParts[$j]) ;
break;
} else {
$k--;
}
}
}
//glue varsParts
$vars[$i] = implode('"',$varsParts);
}
$session=new SessionStore();
for ($i=0; $i < sizeof($vars); $i++) {
$parts = explode("|", $vars[$i]);
$key = $parts[0];
$val = unserialize($parts[1]);
$session->{$key} = $val;
}
return $session;
}
}
/**
* SessionStore
* Container class in which to place unserialized session data
* @package SPLIB
* @access public
*/
class SessionStore {}
?>
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