php是否能够回显将html / css div元素作为类标记提供的纯文本？

<div id="myProfile" <?php if($_GET['page'] == 'myProfile'){echo 'class="show"';}else{echo 'class="hide"';} ?>>
    div content which should be shown/hidden...
</div>

My div doesn't hide when I click a link which adds 'page=myProfile' to the URL. This if() php statement is supposed to echo my css class 'show' and 'hide' when the site is & is not 'myProfile'. Does anyone see an error? I'm giving up now for real…