session_id
Just to elaborate for those who may be having some problems.
If you're using a newer version of PHP that comes with the register globals directive set to "off", you should heed the caution at the top of these notes. It's easier anyway.
Instead of using session_register(...) , simply use somethig like:
<?
//must always start the session first
session_start();
//in place of session register(..) use...like someone said above
$_SESSION['VARNAME'] = $something // or "something";
/* then on the same page or subsequent pages where you want check for the session use something like....
and on another page where the session hasn't been started you have to call session_start(); first, if the session has already been started you don't need to call it again */
session_start();
//instead of session_is_registered();
if(isset($_SESSION['VARNAME']))
{
print("What you want if the session var is set");
}
else
{
print("What you want if the sessions variable is not set");
}
?>
I hope this helps someone! If you want to learn more about $_SESSION and/or it's related "superglobals" try
http://www.php.net/manual/en/printwn/language.variables.predefined.php
good road!
session_is_registered
(PHP 4, PHP 5)
session_is_registered — 変数がセッションに登録されているかどうかを調べる
説明
bool session_is_registered
( string $name
)
グローバル変数がセッションに登録されているかどうかを調べます。
パラメータ
- name
-
変数名。
返り値
session_is_registered() は、 name という名前のグローバル変数が現在のセッションに登録されている場合に TRUE、それ以外の場合に FALSE を返します。
注意
注意: $_SESSION (または PHP 4.0.6 以前の場合は $HTTP_SESSION_VARS) が使用されている場合、ある変数が $_SESSION に登録されているかを確認するために isset() を使用してください。
警告
$_SESSION (もしくは $HTTP_SESSION_VARS) を使用している場合、 session_register(), session_is_registered(), session_unregister() を使用しないでください。
add a note
User Contributed Notessession_is_registered
somedude at wholikesphp dot com
31-Oct-2002 10:02
31-Oct-2002 10:02
miguel dot simoes at swirve dot com
13-Jun-2002 04:27
13-Jun-2002 04:27
When using PHP 4.2.0 even on the same page where you registered the variable with:
session_register("someVar");
if you try to see if the variable is set and do not assign it a value before, the function used in the previous comment will give the same output.
This may show that the variable is declared and will not be set until some value is give assign to it.
I think that this way will give the option to register all the variables used for sure on the process on the first page and using them as the time comes.