stuck with simple php looping logic - php

Question

I have an array which can have any no. of elements in it. Now i want to loop this array and create design such that each li can have 15 elements inside it , next set of li will be created based of multiples of 15's elements.
Now my array has exact 15 elements and the code i am trying creating 2 li , which it should create only 1 li.
May be my logic is too bad or I am missing anything.
Here is my code:-
<?php $result = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15); ?>
<div class="slide">
<?php $design = '<ul class="slides"><li><div class="MainSlider">';
foreach($result as $key=>$row)
{
$design .= '<div class="MainSliderPic">'.$key.'</div>';
if(($key+1)% 15 == 0){
$design .= '</div></li><li><div class="MainSlider">';
}
if(count($result) == $key+1){
$design .= '</div></li></ul>';
}
}
echo $design;
?>
</div>

Answer 1

You can use array_chunk for to achieve it:
$result = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);
$chunks = array_chunk($result, 15);
foreach ($chunks as $chunk) {
echo '<ul><li>';
echo implode('</li><li>', $chunk);
echo '</li></ul>';
}

Answer 2

Don't mix opening and closing of tags in your code. Do it separately where it belongs, e.g.
$design = '<ul class="slides">';
$n = 0;
foreach($result as $key=>$row) {
if ($n == 0)
$design .= '<li><div class="MainSlider">';
$design .= '<div class="MainSliderPic">' . $key . '</div>';
++$n;
if ($n == 15) {
$design .= '</div></li>';
$n = 0;
}
}
$design .= '</ul>';
echo $design;

Answer 3

Try following code:
<?php $result = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15); ?>
<div class="slide">
<?php $design = '<ul class="slides"><li><div class="MainSlider">';
foreach($result as $key=>$row)
{
$design .= '<div class="MainSliderPic">'.$key.'</div>';
if((($key+1)% 15 == 0) && (count($result) != ($key+1))){
$design .= '</div></li><li><div class="MainSlider">';
}
if(count($result) == $key+1){
$design .= '</div></li></ul>';
}
}
echo $design;
?>
</div>