Học php, mysql và javascript - p 46

Example 20-12. You need to login to view this page"); $user = $_SESSION['user']; if (isset($_GET['view'])) $view = sanitizeString($_GET['view']); else $view = $user; if (isset($_POST['text'])) { $text = sanitizeString($_POST['text']); if ($text != "") { $pm = substr(sanitizeString($_POST['pm']),0,1); $time = time(); queryMysql("INSERT INTO rnmessages VALUES(NULL, '$user', '$view', '$pm', $time, '$text')"); } } if ($view != "") { if ($view == { $name1 = $name2 = } else { $name1 = $name2 = } $user) "Your"; "Your"; "$view's"; "$view's"; echo "$name1 Messages"; showProfile($view); echo Type here to leave a message: . | Example 20-12. php include_once if isset _SESSION user die br br You need to login to view this page user _SESSION user if isset _GET view view sanitizeString _GET view else view user if isset _POST text text sanitizeString _POST text if text pm substr sanitizeString _POST pm 0 1 time time queryMysql INSERT INTO rnmessages VALUES NULL user view pm time text if view if view user name1 Your name2 Your else name1 a href view view view a s name2 view s echo h3 name1 Messages h3 showProfile view echo _END form method post action view view Type here to leave a message br textarea name text cols 40 rows 3 textarea br Public input type radio name pm value 0 checked checked Private input type radio name pm value 1 input type submit value Post Message form _END if isset _GET erase erase sanitizeString _GET erase queryMysql DELETE FROM rnmessages WHERE id erase AND recip user 431 query SELECT FROM rnmessages WHERE recip view ORDER BY time DESC result queryMysql query num mysql_num_rows result for j 0 j num j row mysql_fetch_row result if row 3 0 row 1 user row z user echo date M jS y g sa row 4 echo a href echo view row 1 row 1 a if row 3 0 echo wrote quot row 5 quot else echo whispered i font color 006600 quot row 5 quot font i if row 2 user echo a href view view echo erase row 0 erase a echo br if num echo li No messages yet li br echo br a href view view Refresh messages a echo a href view view View name2 friends a The final ingredient in our social networking recipe is Example 20-13 the logout page that closes a session and deletes any associated data and cookies. The result of calling up this program can be seen in Figure 20-8 where the user is now asked to click on a link which will take them to the un-logged-in home page and remove the logged-in links from the top of the screen. Of course you could .