定制php4的session功能

Unrecognized handler ($handler)";
die;
}

/* start the session and register a simple counter */
session_start();
session_register("count");

/* figure out what we should do, depending on the action */
switch ($action) {
case "increment" :
$count = isset($count) ? $count + 1 : 0;
break;

case "destroy" :
session_destroy();
break;

case "gc" :
$maxlife = get_cfg_var("session.gc_maxlifetime");
sess_gc($maxlife);
break;

default:
echo "<li>Unknown action ($action)";
break;
}
?>

<h1>Session Test Script</h1>
<ul>
<li>Handler: <b><?=$handler?></b>
<li>Action: <b><?=$action?></b>
<li>Count: <b><?=$count?></b>
</ul>

<hr size=1>
<form>
<table>
<tr>
<td>Handler:</td>
<td>
<select name="handler">
<option value="dbm">DBM</option>
<option value="mysql">MySQL</option>
</select>
</td>
</tr>
<tr>
<td>Action:</td>
<td>
<select name="action">
<option value="increment">Increment</option>
<option value="destroy">Session Destroy</option>
<option value="gc">Force Garbage Collection</option>
</select>
</td>
</tr>
<tr>
<td></td>
<td><br><input type="submit"></td>
</tr>
</table>
</form>