php - 每 3 次迭代中断 while 循环

Question

我正在使用此 PHP 生成 0-9 的列表。

$counter = 0; 
WHILE ($counter < 10) 
{ 
  print "counter is now " . $counter . "<br>"; 
  $counter++; 
}

我想改变它的工作方式。每第 3 次迭代，我想将打印的文本包装在 <div> 中如果可能的话。

所以最终我输出的代码是:

<div>
counter is now 0
counter is now 1
counter is now 2
</div>
<div>
counter is now 3
counter is now 4
counter is now 5
</div>
<div>
counter is now 6
counter is now 7
counter is now 8
</div>
<div>
counter is now 9
</div>

Answer 1

使用模数运算符，您可以每 3 次迭代拆分输出，但您仍然需要检查可能生成空 div block 的 limit 值

<?php

$counter = 0; 
$limit = 10;

print "<div>\n";

while ($counter < $limit) { 
  print "counter is now " . $counter . "<br>\n"; 

  if (++$counter % 3 === 0 && $counter < $limit) {
    print "</div>\n<div>\n";

  }
}
print "</div>\n";