php 把数字拆成一个一个的

 有时候访问量是几位数字，比如23654789，想做个好看的样式，把代码设置成<span>2</span><span>3</span><span>6</span><span>5</span><span>4</span><span>7</span><span>8</span><span>9</span>

那么怎么把代码弄成这样呢？

<?php 

$textnumber = 23654789

$gewei = $textnumber%10;

$shiwei = (($textnumber-$gewei)/10)%10;

$baiwei = (($textnumber-$gewei-$shiwei)/100)%10;

$qianwei = (($textnumber-$gewei-$shiwei-$baiwei)/1000)%10;

$wanwei = (($textnumber-$gewei-$shiwei-$baiwei-$qianwei)/10000)%10;

$swanwei = (($textnumber-$gewei-$shiwei-$baiwei-$qianwei-$wanwei)/100000)%10;

$qwanwei = (($textnumber-$gewei-$shiwei-$baiwei-$qianwei-$wanwei-$swanwei)/1000000)%10;

$wwanwei = (($textnumber-$gewei-$shiwei-$baiwei-$qianwei-$wanwei-$swanwei-$qwanwei)/10000000)%10;

?>

<span><?php echo $wwanwei ?></span><span><?php echo $qwanwei ?></span><span><?php echo $swanwei ?></span><span><?php echo $wanwei ?></span><span><?php echo $qianwei ?></span><span><?php echo $baiwei ?></span><span><?php echo $shiwei ?></span><span><?php echo $gewei ?></span>