PHP ??
PHP ??
PHP ?? ??? ??? ??(??)? ?? ??? ????? ??? ??(??)? ??? ???? ? ?????. ?? ??? ?? ???? ?? ??? ???? ?? ????? ?? ????? ??? ? ????.
PHP ?? ??
????? ?????? ??? ? ?? ??????? ?? ??? ?? ????. ??? ??? ?? ?????. ???? ??? ???? ?? ????. ?? ?? ?? ??? ? ? ????. ??? ?????? ??? ?????. HTTP ??? ??? ??? ? ?? ??? ? ??? ??? ????, ??? ??? ?? ????.
PHP ??? ?? ??? ?? ??? ??(?: ??? ??, ??? ?? ?)? ??? ???? ? ??? ?????. ?, ?? ??? ?????? ???? ???? ?? ??? ?????. ??? ????? ???? ?? ?? ???? ??????? ??? ? ????.
??? ? ???? ?? ?? ID(UID)? ???? ? UID? ???? ??? ???? ???? ?????. UID? ??? ????? URL? ?? ?????.
PHP ?? ??
PHP ??? ??? ??? ????? ?? ??? ???? ???.
??: session_start() ??? <html> ?? ?? ????? ???.
<?php session_start(); ?> <html> <body> </body> </html>
? ??? ??? ?? ??? ??? ? ??? ???? ??? ??? ?????. , ??? ???? UID? ?????.
?? ?? ? ??
session_start(); _SESSION[name]=value; //
echo $_SESSION[name]; /?? ?? isset($_SESSION[name]); // ?? unset($_SESSION[name]); // ??
session_destroy() // ?? ?? ??
??
?? ??? ???? ???? ??? ??? PHP $_SESSION ??? ???? ????:
<?php session_start(); // 存儲 session 數(shù)據(jù) $_SESSION['views']=1; ?> <html> <head> <meta charset="utf-8"> <title> php中文網(wǎng)(php.cn)</title> </head> <body> <?php // 檢索 session 數(shù)據(jù) echo "瀏覽量：". $_SESSION['views']; ?> </body> </html>
??:
???: 1
In ?? ???? ??? ??? ??? ???? ????. isset() ??? "views" ??? ?????? ??? ?????. "views" ??? ??? ?? ???? ?????. "views"? ???? ??? "views" ??? ???? 1? ?????:
<?php
session_start();
if(isset($_SESSION['views']))
{
$_SESSION['views']=$_SESSION['views']+1;
}
else
{
$_SESSION['views']=1;
}
echo "瀏覽量：". $_SESSION['views'];
?>Destroy Session ?? ?? ???? ?? unset() ?? session_destroy() ??? ??? ? ????.
unset() ??? ??? ?? ??? ???? ? ?????:
<?php
session_start();
if(isset($_SESSION['views']))
{
unset($_SESSION['views']);
}
?>session_destroy() ??? ???? ??? ??? ??? ?? ????:
<?php session_destroy(); ?>
?? : session_destroy() ??? ????? ??? ?? ?? ???? ?????.
session_id??? ? ???? ??? ???? ? ???? ???? ??? SessionID? ?? ???? ???? ?????. Session?
??? ???? ????, SessionID? ?? ???? ?????? Cookie? ?????. ??? ???? ???? ??
? ???? ??? ??? SessionID? ?? ???? ?? SessionID? ???? ????? ???? Session
? ?? ?????. ??. ??? ?????? ??? ?????? ???
? ???? ??? ???? ?? ? ????
??? ????? ?? ??? ?? ??? ??? ? ????. ???? ???? ?? $_SESSION
???? ??? ?? $_SESSION ??? ?? ???? ?? ??? ?? ? ???? ??? ?? ??? ??? ? ??? ????
php .ini ?? ??
session.save_path = '/leapsoulcn';
???? /tmp??, ?? ?? ??? c:/? ???? ?????. tmp ????.
