php怎么运行余数 PHP中余数、取余的妙用

1. <?php<p>  </p><p>$ary=array("name","egineer","sonny","tonny","pingk","apple","phone","clone","pink","colle");</p><p>foreach($aryas$key=>$value){</p><p>$key=$key+1;</p><p>if($key%2==1){echo'<li>';}</p><p>  ?></p><p> <span><?phpecho$key.":".$value;?></span></p><p>  </p><p><?php</p><p> if($key%2==0){echo'</li>';}</p><p>};</p><p> ?></p> 
2.    
3. $ary=array("name","egineer","sonny","tonny","pingk","apple","phone","clone","pink","colle"); 
4. foreach($aryas$key=>$value){ 
5. $key=$key+1; 
6. if($key%2==1){echo'<li>';} 
7.   ?> 
8.  <span><?phpecho$key.":".$value;?></span> 
9.  //Vevb.com 
10. <?php 
11.  if($key%2==0){echo'</li>';} 
12. }; 
13.  ?> 

second_one

1. <?php 
2.    
3. $ary=array("name","egineer","sonny","tonny","pingk","apple","phone","clone","pink","colle"); 
4. foreach($aryas$key=>$value){ 
5. $key=$key; 
6. if($key%3==0){echo'<li>';} 
7.   ?> 
8.  <spanclass="<?php echo($key%3); ?>span"><?phpecho$key.":".$value;?></span> 
9.    
10. <?php 
11.  if($key%3==2){echo'</li>';} 
12. }; 
13.  ?>