3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $date = mktime(0, 0, 0, 4, 1, 2013); $days = date("t", $date); for ($i = 1; $i <= $days; $i++) { if($i % 4 == 0){ echo "<div style='color: red'>" . $i . "</div>"; } else{ echo $i; } }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
123<div style='color: red'>4</div>567<div style='color: red'>8</div>91011<div style='color: red'>12</div>131415<div style='color: red'>16</div>171819<div style='color: red'>20</div>212223<div style='color: red'>24</div>252627<div style='color: red'>28</div>2930