$old_guanjianzi=我,的,php;
标签:<A href=tag.php?so=
<?php $arr=explode(",",$old_guanjianzi); foreach ($arr as $v);echo urlencode( $v);?>><?php  echo $v;?></A>

$old_guanjianzi= "我,的,php";
$ar = explode(',', $old_guanjianzi);
foreach($ar as $v) echo "<a href='tag.php?so={$v}'>{$v}</a>&nbsp;";

------解决方案--------------------
探讨


PHP code
$old_guanjianzi= "我,的,php";
$ar = explode(',', $old_guanjianzi);
foreach($ar as $v) echo "<a href='tag.php?so={$v}'>{$v}</a>&amp;nbsp;";


------解决方案--------------------
PHP code
echo "<a href='tag.php?so=".urlencode($v)."'>{$v}</a>&nbsp;";?>