擅长:python、mysql、java
<p>在PHP中,可以使用<code>modulus(%) operator</code>对每个<code>nth</code>元素执行某些操作。在本例中,我们需要一个基于<code>1</code>的索引,而不是基于<code>0</code>的索引。在</p>
<pre><code>// fake array
$days = array('day1', 'day2', 'day3', 'day4', 'day5', 'day6', 'day7', 'day8');
foreach($days as $idx => $day):
$idx++; // required because our array is 0 based
if(($idx % 4) == 1):
echo '<br/>'. $day;
else:
echo $day;
endif;
endforeach;
</code></pre>