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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.php
Subject: Re: break foreach loop after certain iteration and then start it
Date: Sat, 05 Mar 2016 02:28:51 +0100
Organization: PointedEars Software (PES)
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Message-ID: <2056947.pXOX0CipXs@PointedEars.de>
References: <6586983f-c3bc-4eb7-92a3-6035952e8cbb@googlegroups.com> <56D946D4.9030504@arnowelzel.de>
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Arno Welzel wrote:

> <?php
> $counter = 0;
> 
> foreach($mylist as $element)
        ^^
> {
>     // Do something with $element
> 
>     // Add something every three elements
>     $counter++;
>     if($counter==3)
       ^^
Flow control statements should not be written like function calls.

>     {
>         echo '<div id="logo"></div>';
>         $counter = 0;
>     }
> }

One does not have to reset the counter if one uses the modulo operator, %, 
to determine the indexes that are divisible by 3 without remainder.

  ++$counter;
  if ($counter % 3 === 0)
  {
    …
  }

or

  if (++$counter % 3 === 0)
  {
    …
  }

If the array is not associative and not sparse, the index is implicit and 
starting from 0, so no counter is needed.  0 is divisible by 3 without 
remainder, so one has to look for the remainder 2 for the third, sixth etc. 
element [2 ≡ 1 (mod 3)]:

  foreach ($mylist as $index => $element)
  {
    if ($index % 3 === 2)
    {
      …
    }
  }

Or, if this is too confusing,

    if (($index + 1) % 3 === 0)
    {
      …
    }

> ?>

Don’t.

-- 
PointedEars
Zend Certified PHP Engineer 
<http://www.zend.com/en/yellow-pages/ZEND024953> | Twitter: @PointedEars2
Please do not cc me. / Bitte keine Kopien per E-Mail.