modulus loop calculation of non even numbers - php

Question

I need to wrap my html output with <ul> tags.
Using modulus i can start the opening tags (every 4th) using
if( $i==0 || $i % 4==0 )
but for the closing </ul> i need a pattern of 3, 7, 11, 15, 19 etc..
here is my attempt if ( $i!=0 && (($i-1) % 4 == 0 || $i==$max-1) )
full code
$str = '';
$i = 0;
$max = count($value['title']);
foreach ($value['title'] as $key2){
//if( $i==0 || $i==4 || $i==8 || $i==12 || $i==16 )
if( $i==0 || $i % 4==0 )
$str .= "<ul>";
$str .= "<li><a href='#'>$key2</a></li>";
if( $i==3 || $i==7 || $i==11 || $i==15 || $i==19 || $i==$max-1)
//if ( $i!=0 && (($i-1) % 4 == 0 || $i==$max-1) )
//if( $i!=0 || $i % 3==1 || $i==$max-1)
$str .= "</ul>";
$i++;
}
echo $str;
after posting the question, i got it by changing the minus to a plus if ( $i!=0 && (($i+1) % 4 == 0 || $i==$max-1) )

Answer 1

I prefer to use to use implodes on arrays myself, but this will do things the way you were heading.
echo '<ul>';
foreach ( $array as $key => $value ) {
echo "<li><a href='#'>$value</a></li>";
if ( 3 === $key % 4 ) {
echo '</ul><ul>';
}
}
echo '</ul>';
I don't like this method because it means when the array has a multiple of four items there will be an empty ul tag. Could make a difference or not, but I think its sloppy.
Instead my I suggest:
$list = '';
foreach ( $array as $key => $value ) {
$list .="<li><a href='#'>$value</a></li>";
if ( 3 === $key % 4 ) {
echo "<ul>$list</ul>";
$list = '';
}
}
if ( $list ) {
echo "<ul>$list</ul>";
}

Answer 2

Something like this
$value['title'] = range(0, 100);
$max = count($value['title']);
$i = 0;
$count = 4;
$str = '';
foreach ($value['title'] as $key2)
{
if ($i % $count == 0)
$str .= "<ul>" . PHP_EOL;
$str .= "<li><a href='#'>$key2</a></li>" . PHP_EOL;
if ($i % $count == $count - 1 || $i == $max - 1)
$str .= "</ul>" . PHP_EOL;
$i++;
}
echo $str;
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