<?php
$ary=array("name","egineer","sonny","tonny","pingk","apple","phone","clone","pink","colle");
foreach($ary as $key=>$value){
$key=$key+1;
if($key%2==1){echo ‘<li>‘;}
?>
<span><?php echo $key.":". $value;?></span>
<?php
if($key%2==0){echo ‘</li>‘;}
};
?>
second_one
<?php
$ary=array("name","egineer","sonny","tonny","pingk","apple","phone","clone","pink","colle");
foreach($ary as $key=>$value){
$key=$key;
if($key%3==0){echo ‘<li>‘;}
?>
<span class="<?php echo($key%3); ?>span"><?php echo $key.":". $value;?></span>
<?php
if($key%3==2){echo ‘</li>‘;}
};
?>
大家可以运行以后查看结果并分析其巧妙之处~
原文：http://www.jb51.net/article/68567.htm