Created
October 14, 2011 03:06
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Learning about PHP sessions
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| <?php | |
| if ( array_key_exists('sname', $_REQUEST) ) { | |
| session_name($_REQUEST['sname']); | |
| } | |
| session_start(); | |
| $messages = ""; | |
| function show( $str ) { global $messages; $messages .= $str; } | |
| function show_sess_vars() { | |
| foreach ( $_SESSION as $key => $val ) { | |
| show("Session var '$key': \t'$val'\n"); | |
| } | |
| } | |
| show("Session name: \t" . session_name() . "\n"); | |
| show("Session ID: \t" . session_id() . "\n"); | |
| foreach ( $_REQUEST as $key => $val ) { | |
| if ( $key == 'regenerate' ) | |
| { | |
| session_regenerate_id(); | |
| show("session_regenerate_id();\n"); | |
| show("Session name: \t" . session_name() . "\n"); | |
| show("Session ID: \t" . session_id() . "\n"); | |
| } | |
| else if ( $key == 'clear' ) | |
| { | |
| $_SESSION = array(); | |
| show("\$_SESSION = array();\n"); | |
| } | |
| else if ( $key == 'switch' ) | |
| { | |
| show("Will attempt to switch session name.. vars:\n"); | |
| show_sess_vars(); | |
| session_write_close(); | |
| $res = session_name($val); | |
| show("session_name($val) - res: $res\n"); | |
| session_start(); | |
| show("Session name: \t" . session_name() . "\n"); | |
| show("Session ID: \t" . session_id() . "\n"); | |
| } | |
| else if ( $key == 'switch2' ) | |
| { | |
| show("Will attempt to switch session name.. vars:\n"); | |
| show_sess_vars(); | |
| session_write_close(); | |
| show("session_write_close();\n"); | |
| $sess_id = $_COOKIE[$val]; | |
| if ( $sess_id ) { | |
| show("session '$val' exists, resuming..\n"); | |
| //unset($_SESSION); // to make sure - this should be reloaded below | |
| session_name( $val ); | |
| session_id( $sess_id ); | |
| session_start(); // fills $_SESSION from the named session | |
| } else { | |
| show("creating new session '$val'...\n"); | |
| session_name( $val ); | |
| session_start(); | |
| session_regenerate_id(); // create new (copy of old), leave old alone | |
| $_SESSION = array(); // wipe data clean for a fresh session | |
| show("regenerated ID and wiped SESSION superglobal\n"); | |
| } | |
| show("Session name: \t" . session_name() . "\n"); | |
| show("Session ID: \t" . session_id() . "\n"); | |
| } | |
| else | |
| { | |
| if ( array_key_exists($key, $_COOKIE) ) { | |
| show("Cookie: \t'$key': \t'$val'\n"); | |
| } else { | |
| show("Setting session var: \t'$key': \t'$val'\n"); | |
| $_SESSION[$key] = $val; | |
| } | |
| } | |
| } | |
| show("----\nSession vars:\n"); | |
| show_sess_vars(); | |
| if ( false ) { | |
| session_write_close(); | |
| session_name("edit_assembly"); | |
| session_start(); | |
| show("Session name: \t" . session_name() . "\n"); | |
| show("Session ID: \t" . session_id() . "\n"); | |
| show_sess_vars(); | |
| } | |
| ?> | |
| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"> | |
| <html> | |
| <head> | |
| <title> PHP session testing </title> | |
| <style type='text/css'> | |
| body { background-color: gray; } | |
| #content { background-color: white; width: 70%; margin: 1em auto 1em auto; padding: 2em; | |
| font-family: Verdana, monospace; font-size: 10pt; } | |
| </style> | |
| </head> | |
| <body> | |
| <div id='content'> | |
| <h1> PHP session test: </h1> | |
| <pre><?php echo $messages; ?></pre> | |
| </div> | |
| </body> | |
| </html> |
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