## Class THttpSession

Description

Implements interfaces:

- IModule

THttpSession class

THttpSession provides session-level data management and the related configurations. To start the session, call {@open}; to complete and send out session data, call {@close}; to destroy the session, call {@destroy}. If AutoStart is true, then the session will be started once the session module is loaded and initialized.

To access data stored in session, use THttpSession like an associative array. For example,

       $session=new THttpSession;
       $session->open();
       $value1=$session['name1'];  // get session variable 'name1'
          $value2=$session['name2'];  // get session variable 'name2'
          foreach($session as $name=>$value) // traverse all session variables
          $session['name3']=$value3;  // set session variable 'name3'

The following configurations are available for session: AutoStart, setCookie, setCacheLimiter, SavePath, UseCustomStorage, GCProbability, setCookieUsage, Timeout. See the corresponding setter and getter documentation for more information. Note, these properties must be set before the session is started.

THttpSession can be inherited with customized session storage method. Override _open, _close, _read, _write, _destroy and _gc and set UseCustomStorage to true. Then, the session data will be stored using the above methods.

By default, THttpSession is registered with TApplication as the request module. It can be accessed via TApplication::getSession().

THttpSession may be configured in application configuration file as follows,

     <module id="session" class="THttpSession" SessionName="SSID" SavePath="/tmp"
             CookieMode="Allow" UseCustomStorage="false" AutoStart="true" GCProbability="1"
             UseTransparentSessionID="true" TimeOut="3600" />

where SessionName, SavePath, CookieMode, UseCustomStorage, AutoStart, GCProbability, UseTransparentSessionID and getTimeOut are configurable properties of THttpSession.

- since: 3.0
- version: $Id: THttpSession.php 1398 2006-09-08 19:31:03Z xue $
- author: Qiang Xue <qiang.xue@gmail.com>

Located in /Web/THttpSession.php (line 64)

    TComponent
       |
       --TApplicationComponent
          |
          --THttpSession

Method Summary
void __destruct ()
void add (mixed $key, mixed $value)
void clear ()
void close ()
boolean contains (mixed $key)
integer count ()
void destroy ()
boolean getAutoStart ()
THttpCookie getCookie ()
THttpSessionCookieMode getCookieMode ()
integer getCount ()
integer getGCProbability ()
string getID ()
boolean getIsStarted ()
TSessionIterator getIterator ()
array getKeys ()
string getSavePath ()
string getSessionID ()
string getSessionName ()
integer getTimeout ()
boolean getUseCustomStorage ()
boolean getUseTransparentSessionID ()
void init (TXmlElement $config)
mixed itemAt (mixed $key)
boolean offsetExists (mixed $offset)
mixed offsetGet (integer $offset)
void offsetSet (integer $offset, mixed $item)
void offsetUnset (mixed $offset)
void open ()
mixed remove (mixed $key)
void setAutoStart (boolean $value)
void setCookieMode (THttpSessionCookieMode $value)
void setGCProbability (integer $value)
void setID (string $value)
void setSavePath (string $value)
void setSessionID (string $value)
void setSessionName (string $value)
void setTimeout (integer $value)
void setUseCustomStorage (boolean $value)
void setUseTransparentSessionID (boolean $value)
array toArray ()
boolean _close ()
boolean _destroy (string $id)
boolean _gc (integer $maxLifetime)
boolean _open (string $savePath, string $sessionName)
string _read (string $id)
boolean _write (string $id, string $data)
Methods
Destructor __destruct (line 95)

Destructor.

Closes session.

- access: public

void __destruct ()
add (line 523)

Adds a session variable.

Note, if the specified name already exists, the old value will be removed first.

- access: public

void add (mixed $key, mixed $value)

- mixed $key: session variable name
- mixed $value: session variable value

clear (line 548)

Removes all session variables

- access: public

void clear ()
close (line 151)

Ends the current session and store session data.

- access: public

void close ()
contains (line 558)

- return: whether there is the named session variable
- access: public

boolean contains (mixed $key)

- mixed $key: session variable name

count (line 493)

Returns the number of items in the session.

This method is required by Countable interface.

- return: number of items in the session.
- access: public

integer count ()
destroy (line 163)

Destroys all data registered to a session.

- access: public

void destroy ()
getAutoStart (line 315)

- return: whether the session should be automatically started when the session module is initialized, defaults to false.
- access: public

boolean getAutoStart ()
getCookie (line 266)

- return: cookie that will be used to store session ID
- access: public

THttpCookie getCookie ()
getCookieMode (line 276)

- return: how to use cookie to store session ID. Defaults to THttpSessionCookieMode::Allow.
- access: public

THttpSessionCookieMode getCookieMode ()
getCount (line 483)

- return: the number of session variables
- access: public

integer getCount ()
getGCProbability (line 335)

- return: the probability (percentage) that the gc (garbage collection) process is started on every session initialization, defaults to 1 meaning 1% chance.
- access: public

integer getGCProbability ()
getID (line 104)

- return: id of this module
- access: public

string getID ()
getIsStarted (line 175)

- return: whether the session has started
- access: public

boolean getIsStarted ()
getIterator (line 475)

Returns an iterator for traversing the session variables.

This method is required by the interface IteratorAggregate.

- return: an iterator for traversing the session variables.
- access: public

TSessionIterator getIterator ()
getKeys (line 501)

- return: the list of session variable names
- access: public

array getKeys ()
getSavePath (line 225)

- return: the current session save path, defaults to '/tmp'.
- access: public

string getSavePath ()
getSessionID (line 183)

- return: the current session ID
- access: public

string getSessionID ()
getSessionName (line 203)

- return: the current session name
- access: public

string getSessionName ()
getTimeout (line 384)

- return: the number of seconds after which data will be seen as 'garbage' and cleaned up, defaults to 1440 seconds.
- access: public

integer getTimeout ()
getUseCustomStorage (line 247)

- return: whether to use user-specified handlers to store session data. Defaults to false.
- access: public

boolean getUseCustomStorage ()
getUseTransparentSessionID (line 365)

- return: whether transparent sid support is enabled or not, defaults to false.
- access: public

boolean getUseTransparentSessionID ()
init (line 123)

Initializes the module.

This method is required by IModule. If AutoStart is true, the session will be started.

- access: public

void init (TXmlElement $config)

- TXmlElement $config: module configuration

itemAt (line 512)

Returns the session variable value with the session variable name.

This method is exactly the same as offsetGet.

- return: the session variable value, null if no such variable exists
- access: public

mixed itemAt (mixed $key)

- mixed $key: the session variable name

offsetExists (line 576)

This method is required by the interface ArrayAccess.

- access: public

boolean offsetExists (mixed $offset)

- mixed $offset: the offset to check on

offsetGet (line 586)

This method is required by the interface ArrayAccess.

- return: the element at the offset, null if no element is found at the offset
- access: public

mixed offsetGet (integer $offset)

- integer $offset: the offset to retrieve element.

offsetSet (line 596)

This method is required by the interface ArrayAccess.

- access: public

void offsetSet (integer $offset, mixed $item)

- integer $offset: the offset to set element
- mixed $item: the element value

offsetUnset (line 605)

This method is required by the interface ArrayAccess.

- access: public

void offsetUnset (mixed $offset)

- mixed $offset: the offset to unset element

open (line 134)

Starts the session if it has not started yet.

- access: public

void open ()
remove (line 533)

Removes a session variable.

- return: the removed value, null if no such session variable.
- access: public

mixed remove (mixed $key)

- mixed $key: the name of the session variable to be removed

setAutoStart (line 324)

- access: public
- throws: TInvalidOperationException if session is started already

void setAutoStart (boolean $value)

- boolean $value: whether the session should be automatically started when the session module is initialized, defaults to false.

setCookieMode (line 290)

- access: public
- throws: TInvalidOperationException if session is started already

void setCookieMode (THttpSessionCookieMode $value)

- THttpSessionCookieMode $value: how to use cookie to store session ID

setGCProbability (line 345)

- access: public
- throws: TInvalidOperationException if session is started already
- throws: TInvalidDataValueException if the value is beyond [0,100].

void setGCProbability (integer $value)

- integer $value: the probability (percentage) that the gc (garbage collection) process is started on every session initialization.

setID (line 112)

- access: public

void setID (string $value)

- string $value: id of this module

setSavePath (line 234)

- access: public
- throws: TInvalidOperationException if session is started already

void setSavePath (string $value)

- string $value: the current session save path

setSessionID (line 192)

- access: public
- throws: TInvalidOperationException if session is started already

void setSessionID (string $value)

- string $value: the session ID for the current session

setSessionName (line 212)

- access: public
- throws: TInvalidOperationException if session is started already

void setSessionName (string $value)

- string $value: the session name for the current session, must be an alphanumeric string, defaults to PHPSESSID

setTimeout (line 393)

- access: public
- throws: TInvalidOperationException if session is started already

void setTimeout (integer $value)

- integer $value: the number of seconds after which data will be seen as 'garbage' and cleaned up

setUseCustomStorage (line 258)

- access: public

void setUseCustomStorage (boolean $value)

- boolean $value: whether to use user-specified handlers to store session data. If true, make sure the methods _open, _close, _read, _write, _destroy, and _gc are overridden in child class, because they will be used as the callback handlers.

setUseTransparentSessionID (line 373)

- access: public

void setUseTransparentSessionID (boolean $value)

- boolean $value: whether transparent sid support is enabled or not.

toArray (line 566)

- return: the list of all session variables in array
- access: public

array toArray ()
_close (line 418)

Session close handler.

This method should be overriden if UseCustomStorage is set true.

- return: whether session is closed successfully
- access: public

boolean _close ()
_destroy (line 452)

Session destroy handler.

This method should be overriden if UseCustomStorage is set true.

- return: whether session is destroyed successfully
- access: public

boolean _destroy (string $id)

- string $id: session ID

_gc (line 463)

Session GC (garbage collection) handler.

This method should be overriden if UseCustomStorage is set true.

- return: whether session is GCed successfully
- access: public

boolean _gc (integer $maxLifetime)

- integer $maxLifetime: the number of seconds after which data will be seen as 'garbage' and cleaned up.

_open (line 408)

Session open handler.

This method should be overriden if UseCustomStorage is set true.

- return: whether session is opened successfully
- access: public

boolean _open (string $savePath, string $sessionName)

- string $savePath: session save path
- string $sessionName: session name

_read (line 429)

Session read handler.

This method should be overriden if UseCustomStorage is set true.

- return: the session data
- access: public

string _read (string $id)

- string $id: session ID

_write (line 441)

Session write handler.

This method should be overriden if UseCustomStorage is set true.

- return: whether session write is successful
- access: public

boolean _write (string $id, string $data)

- string $id: session ID
- string $data: session data

#### Inherited Methods

Inherited From TApplicationComponent

> TApplicationComponent::getApplication()
> TApplicationComponent::getRequest()
> TApplicationComponent::getResponse()
> TApplicationComponent::getService()
> TApplicationComponent::getSession()
> TApplicationComponent::getUser()
> TApplicationComponent::publishAsset()
> TApplicationComponent::publishFilePath()

Inherited From TComponent

> TComponent::addParsedObject()
> TComponent::attachEventHandler()
> TComponent::canGetProperty()
> TComponent::canSetProperty()
> TComponent::createdOnTemplate()
> TComponent::detachEventHandler()
> TComponent::evaluateExpression()
> TComponent::evaluateStatements()
> TComponent::getEventHandlers()
> TComponent::getSubProperty()
> TComponent::hasEvent()
> TComponent::hasEventHandler()
> TComponent::hasProperty()
> TComponent::raiseEvent()
> TComponent::setSubProperty()
> TComponent::__get()
> TComponent::__set()

Documentation generated on Sun, 14 Jan 2007 21:42:43 -0500 by phpDocumentor 1.3.0RC4