$re = '/class=["\']\bcustom--week is-active\b.*?range["]>(.*?)<\//';
$str = '<div class="Week__wrapper"><div class="custom--week"><a href="/nfl/schedule/_/week/2/year/2024/seasontype/1" tabindex="0"><span class="week week-range">Pre wk 1</span><span class="week">Aug 8 - 14</span></a></div><div class="custom--week"><a href="/nfl/schedule/_/week/3/year/2024/seasontype/1" tabindex="0"><span class="week week-range">Pre wk 2</span><span class="week">Aug 15 - 21</span></a></div><div class="custom--week"><a href="/nfl/schedule/_/week/4/year/2024/seasontype/1" tabindex="0"><span class="week week-range">Pre wk 3</span><span class="week">Aug 22 - Sep 3</span></a></div><div class="custom--week is-active"><a href="/nfl/schedule/_/week/1/year/2024/seasontype/2" tabindex="0"><span class="week week-range">Week 1</span><span class="week">Sep 4 - 10</span></a></div><div class="custom--week"><a href="/nfl/schedule/_/week/2/year/2024/seasontype/2" tabindex="0"><span class="week week-range">Week 2</span><span class="week">Sep 11 - 17</span></a></div><div class="custom--week"><a href="/nfl/schedule/_/week/3/year/2024/seasontype/2" tabindex="0"><span class="week week-range">Week 3</span><span class="week">Sep 18 - 24</span></a></div><div class="custom--week"><a href="/nfl/schedule/_/week/4/year/2024/seasontype/2" tabindex="0"><span class="week week-range">Week 4</span><span class="week">Sep 25 - Oct 1</span></a></div></div>';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php