$arr1 = array(0=>"Horse",1=>"Dog");//非关联数组
$arr2 = array("an1"=>"Horse","an2"=>"Dog");//关联数组

function is_assoc($arr) {
    return array_keys($arr) !== range(0, count($arr) - 1);
}

$arr = array(0=>"Horse",1=>"Dog");
var_dump(is_assoc($arr));//bool(false)
$arr = array(2=>"Horse",3=>"Dog");
var_dump(is_assoc($arr));//bool(true)
$arr = array("an1"=>"Horse","an2"=>"Dog");
var_dump(is_assoc($arr));//bool(true)
/**
 * 上面前两个都是非关联数组，却是两种不同的结果，显然原作者没考虑到index不是 从0开始 或 连续 的情况
 */

function is_assoc($arr) {
    return array_keys(array_merge($arr)) !== range(0, count($arr) - 1);
}

^(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){255,})(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){65,}@)(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F]|(?:\\x5C[\\x00-\\x7F]))*\\x22))(?:\\.(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F]|(?:\\x5C[\\x00-\\x7F]))*\\x22)))*@(?:(?:(?!.*[^.]{64,})(?:(?:(?:xn--)?[a-z0-9]+(?:-[a-z0-9]+)*\\.){1,126}){1,}(?:(?:[a-z][a-z0-9]*)|(?:(?:xn--)[a-z0-9]+))(?:-[a-z0-9]+)*)|(?:\\[(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){7})|(?:(?!(?:.*[a-f0-9][:\\]]){7,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?)))|(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){5}:)|(?:(?!(?:.*[a-f0-9]:){5,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3}:)?)))?(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))(?:\\.(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))){3}))\\]))$

// [Action in Frame 1]，给flash传值
getURL(’javascript:getClipboardData()’);
 //当鼠标在flash上按下的时候执行。。。 
on (press) { System.setClipboard(str);//设置粘贴板的内容 
getURL(’javascript:hideMenu(’fwin_dialog’, ’dialog’)’);//关闭discuzx的弹出菜单’
 }

function getClipboardData() { window.document.clipboardswf.SetVariable(’str’, clipboardswfdata); }
 //关于hideMenu函数就不作介绍，是隐藏discuzx的弹出菜单的。

$data = array();//初始化变量
//从数据库取值，遍历
$query = DB::query("SELECT * FROM ".DB::table(’home_blog_category’)." ORDER BY displayorder");
while($value = DB::fetch($query)) {
	$value[’catname’] = dhtmlspecialchars($value[’catname’]);
	$data[$value[’catid’]] = $value;
}
foreach($data as $key => $value) {
	$upid = $value[’upid’];
	$data[$key][’level’] = 0;
	if($upid && isset($data[$upid])) {
		$data[$upid][’children’][] = $key;
		while($upid && isset($data[$upid])) {
			$data[$key][’level’] += 1;
			$upid = $data[$upid][’upid’];
		}
	}
}
//最后得到要操作的数组

//显示一级分类
foreach ($category as $key=>$value) {
	if($value[’level’] == 0) {
		echo showcategoryrow($key, 0, ’’);//该函数在下面
	}
}

function showcategoryrow($key, $level = 0, $last = ’’) {
//下面三句可以直接认为是上面刚才得到的$data数组
    global $_G;
    loadcache(’blogcategory’);
    $value = $_G[’cache’][’blogcategory’][$key];

    $return = ’’;
//下面两句可跳过
    include_once libfile(’function/portalcp’);
    $value[’num’] = category_get_num(’blog’, $key);
    if($level == 2) {
        $class = $last ? ’lastchildboard’ : ’childboard’;
        $return = ’<tr class="hover"><td class="td25"><input type="text" class="txt" name="order[’.$value[’catid’].’]" value="’.$value[’displayorder’].’" /></td><td><div class="’.$class.’">’.
        ’<input type="text" name="name[’.$value[’catid’].’]" value="’.$value[’catname’].’" class="txt" />’.
        ’</div>’.
        ’</td><td>’.$value[num].’</td><td><a href="’.ADMINSCRIPT.’?action=blogcategory&operation=delete&catid=’.$value[’catid’].’">’.cplang(’delete’).’</a></td></tr>’;
    } elseif($level == 1) {
        $return = ’<tr class="hover"><td class="td25"><input type="text" class="txt" name="order[’.$value[’catid’].’]" value="’.$value[’displayorder’].’" /></td><td><div class="board">’.
        ’<input type="text" name="name[’.$value[’catid’].’]" value="’.$value[’catname’].’" class="txt" />’.
        ’<a class="addchildboard" onclick="addrowdirect = 1;addrow(this, 2, ’.$value[’catid’].’)" href="###">’.cplang(’blogcategory_addthirdcategory’).’</a></div>’.
        ’</td><td>’.$value[num].’</td><td><a href="’.ADMINSCRIPT.’?action=blogcategory&operation=delete&catid=’.$value[’catid’].’">’.cplang(’delete’).’</a></td></tr>’;
        for($i=0,$L=count($value[’children’]); $i<$L; $i++) {
            $return .= showcategoryrow($value[’children’][$i], 2, $i==$L-1);
        }
    } else {
        $return = ’<tr class="hover"><td class="td25"><input type="text" class="txt" name="order[’.$value[’catid’].’]" value="’.$value[’displayorder’].’" /></td><td><div class="parentboard">’.
        ’<input type="text" name="name[’.$value[’catid’].’]" value="’.$value[’catname’].’" class="txt" />’.
        ’</div>’.
        ’</td><td>’.$value[num].’</td><td><a href="’.ADMINSCRIPT.’?action=blogcategory&operation=delete&catid=’.$value[’catid’].’">’.cplang(’delete’).’</a></td></tr>’;
        for($i=0,$L=count($value[’children’]); $i<$L; $i++) {
            $return .= showcategoryrow($value[’children’][$i], 1, ’’);
        }
        $return .= ’<tr><td class="td25"></td><td colspan="3"><div class="lastboard"><a class="addtr" onclick="addrow(this, 1, ’.$value[’catid’].’)" href="###">’.cplang(’blogcategory_addsubcategory’).’</a></div>’;
    }
    return $return;
}