PHP中余数、取余的妙用

    <?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~