How do I"catch" every 7th item in a list?

I'm using DirectoryIterator to list files. In this scenario my dir contains 19 files.

I need to create a list which wraps 7 files into a <div>.

I must be tired, because I'm not able to do this simple task.

My code is updated to reflect suggestions below:

$i = 0;
echo '<div class="first_div">';

foreach ($dir as $fileinfo) {
  if ($fileinfo->isFile()) {
    if(($i % 7 == 0) && ($i > 0) )
      echo '</d开发者_StackOverflow中文版iv><div>';

    echo 'My file';
    $i++;
  }
}
echo '</div>';

Any help appreaciated.

Something along these lines:

echo '<div>';

$i = 0;
foreach ($dir as $fileinfo) {
   if($i % 7 == 0 && $i != 0) {
       echo '</div><div>';
   }
   // do stuff
   $i++;
}

echo '</div>';

or ssomething like

$chunk_size = 7;
foreach (array_chunk($dir, $chunk_size) as $chunk) {
   echo '<div>';
   foreach ($chunk as $fileinfo) {
      // echo list item $fileinfo here
   }
   echo '</div>';
}

Try using the mod operator (%) to determine if the current file number is the 7th one:

echo "<div>";
$i = 0;
foreach ($dir as $fileinfo) {
   // Remainder is 0, so its the first of 7 files. 
   // Skip this for the first one, or we'll get a blank div to start with
   if($i % 7 == 0 && $i>0) echo "</div><div>";
   echo $filenamehere;
   $i++;
}
echo "</div>";

(Code is untested but should work)

EDIT : Used an independent counter for $i, since the index seemed to start at 2 and not 0 as expected.

Somesthing similar to this:

$c = 0;
foreach ($files as $file) {
  echo $file;
  if ($c % 7 == 0) {
    //7th file
  }
  $c++;
}

Using mod 7

$counter += 1;
if($counter % 7 = 0)
    //New div

Not 100% sure on syntax for this i Php but ther must be some

You can use array_chunk() function to split an array to chunks.

<?
$dir_chunks = array_chunk($dir, 7);

foreach($dir_chunks as $dir)
{
    echo '<div>';
    foreach ($dir as $fileinfo) {
      if ($fileinfo->isFile()) {
         // build list here
      }
    }
    echo '</div>';
}   
?>

Or (throwing out the % operator and putting in more SPL)

<?php
$path = '......';
$nrit = new NoRewindIterator(new DirectoryIterator($path));
while ( $nrit->valid() ) {
  echo "<div>\n";
  foreach( new LimitIterator($nrit, 0, 7) as $it ) {
    echo '  ', $it, "\n";
  }
  echo "</div>\n";
}

Use this code:

if(($i-2) % 7 == 0)