<div class="winning_numbers cleared">
<ul>
<li class="girl1 number4 ">
<p class="number">4</p>
</li>
<li class="girl2 number7 ">
<p class="number">7</p>
</li>
<li class="girl3 number5 ">
<p class="number">5</p>
</li>
<li class="girl4 number8 ">
<p class="number">8</p>
</li>
<li class="girl5 number26 ">
<p class="number">26</p>
</li>
<li class="girl6 number3">
<div class="hider">
<p class="number">3</p>
</div>
</li>
</ul>
</div>
<?php
$re = '/<p class="number">(.+)<\/p>/';
$str = '<div class="winning_numbers cleared">
<ul>
<li class="girl1 number4 ">
<p class="number">4</p>
</li>
<li class="girl2 number7 ">
<p class="number">7</p>
</li>
<li class="girl3 number5 ">
<p class="number">5</p>
</li>
<li class="girl4 number8 ">
<p class="number">8</p>
</li>
<li class="girl5 number26 ">
<p class="number">26</p>
</li>
<li class="girl6 number3">
<div class="hider">
<p class="number">3</p>
</div>
</li>
</ul>
</div>';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
$mcount = preg_match_all('~\<p class=\"number\"\>([0-9]+)\<\/p~is', $str, $matches);
if (count($mcount) > 0)) {
print_r($matches[1]);
}