<?php

$fruits = "pear|apple|strawberry|lime|elderberry|watermelon|orange|banana|fig|mango|plum";
$fruitlist = implode('</li><li>', array_filter(explode('|', $fruits)));
$fruitlist = "
<ul>
  <li>$fruitlist</li>
</ul>
";

echo $fruitlist;

$fruits = "pear|apple|strawberry|lime|elderberry|watermelon|orange|banana|fig|mango|plum";
$fruitlist = implode(
    "</li>\n<li>", 
    array_map('ucwords', array_filter(explode('|', $fruits)))
);
$fruitlist = "
<ul>
<li>$fruitlist</li>
</ul>
";

echo $fruitlist;

?>

<ul>
  <li>pear</li><li>apple</li><li>strawberry</li><li>lime</li><li>elderberry</li><li>watermelon</li><li>orange</li><li>banana</li><li>fig</li><li>mango</li><li>plum</li>
</ul>

<ul>
<li>Pear</li>
<li>Apple</li>
<li>Strawberry</li>
<li>Lime</li>
<li>Elderberry</li>
<li>Watermelon</li>
<li>Orange</li>
<li>Banana</li>
<li>Fig</li>
<li>Mango</li>
<li>Plum</li>
</ul>