如何使用php添加不同的CSS到最后的mysql查询结果

Question

I'm retrieving 4 latest items from the database and show them in a list. My question is that how can I add a different HTML class to the last item?! for example,

<ul>
    <li class="list">number 1</li>
    <li class="list">number 2</li>
    <li class="list">number 3</li>
    <li class="list last-child">number 4</li> 
</ul>

how can I add last-child to the last item using php?

Answer 1

Instead of assigning a class using PHP, use :last-child pseudo instead

ul.class_name li:last-child { /* This will target last li in the ul */
   /* Styles */
}

Demo

Better assign a class to your ul element to distinguish with other ul elements in the same document.

---

If you want to literally add the class to the DOM for some reason than you can use a counter variable with mysqli_num_rows (Here I assume you are atleast using mysqli_()).

$counter = 0;
$total_rows = mysqli_num_rows($query);

while($throw_results = mysqli_fetch_array($query)) {
   $counter++; /* Increment the counter by 1 */
   if($total_rows == $counter) {
      /* Add class if total rows = counter value */
   }
}