新手问题---关于一个参数的解释
初学php，在网上看到一个例子，如下：
<?php
if (isset($_POST['action']) && $_POST['action'] == 'submitted') {
print '<pre>';
print_r($_POST);
print '<a href="'. $_SERVER['PHP_SELF'] .'">Please try again</a>';
print '</pre>';
} else {
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
Name: <input type="text" name="personal[name]"><br>
Email: <input type="text" name="personal[email]"><br>
Beer: <br>
<select multiple name="beer[]">
<option value="warthog">Warthog
<option value="guinness">Guinness
</select><br>
<input type="hidden" name="action" value="submitted">
<input type="submit" name="submit" value="submit me!">
</form>
<?php
}
?>
