CMS AP-Fusion - движок для вашего сайта

session_start

(PHP 4 , PHP 5)

session_start -- Initialize session data

Description

bool session_start ( void )

session_start() creates a session or resumes the current one based on the current session id that's being passed via a request, such as GET, POST, or a cookie.

This function always returns TRUE.

Замечание: If you are using cookie-based sessions, you must call session_start() before anything is outputted to the browser.

Пример 1. A session example: page1.php


<?php


// page1.php




session_start
();



echo 
'Welcome to page #1'
;




$_SESSION
[
'favcolor'
] = 
'green'
;


$_SESSION
[
'animal'
]   = 
'cat'
;


$_SESSION
[
'time'
]     = 
time
();




// Works if session cookie was accepted


echo 
'<br /><a href="../p/page2.php">page 2</a>'
;




// Or maybe pass along the session id, if needed


echo 
'<br /><a href="../p/page2.php?' 
. 
SID 
. 
'">page 2</a>'
;


?>

After viewing page1.php, the second page page2.php will magically contain the session data. Read the session reference for information on propagating session ids as it, for example, explains what the constant SID is all about.

Пример 2. A session example: page2.php


<?php


// page2.php




session_start
();



echo 
'Welcome to page #2<br />'
;



echo 
$_SESSION
[
'favcolor'
]; 
// green


echo 
$_SESSION
[
'animal'
];   
// cat


echo 
date
(
'Y m d H:i:s'
, 
$_SESSION
[
'time'
]);




// You may want to use SID here, like we did in page1.php


echo 
'<br /><a href="../p/page1.php">page 1</a>'
;


?>

If you want to use a named session, you must call session_name() before calling session_start().

session_start() will register internal output handler for URL rewriting when trans-sid is enabled. If a user uses ob_gzhandler or like with ob_start(), the order of output handler is important for proper output. For example, user must register ob_gzhandler before session start.

Замечание: Use of zlib.output_compression is recommended rather than ob_gzhandler()

Замечание: As of PHP 4.3.3, calling session_start() while the session has already been started will result in an error of level E_NOTICE. Also, the second session start will simply be ignored.

Смотрите также $_SESSION, session.auto_start, and session_id().

Все функции PHP: