3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i = 0; while($i<=10 ){ echo '<label for=""></label><select name="comp'. $i++ .'></select><br>'; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<label for=""></label><select name="comp0></select><br><label for=""></label><select name="comp1></select><br><label for=""></label><select name="comp2></select><br><label for=""></label><select name="comp3></select><br><label for=""></label><select name="comp4></select><br><label for=""></label><select name="comp5></select><br><label for=""></label><select name="comp6></select><br><label for=""></label><select name="comp7></select><br><label for=""></label><select name="comp8></select><br><label for=""></label><select name="comp9></select><br><label for=""></label><select name="comp10></select><br>

preferences:
255.2 ms | 407 KiB | 387 Q