3v4l.org

run code in 300+ PHP versions simultaneously
<?php for($i = 0; $i <= 62; $i += 6) { $param1 = ($i+6) - 6; $param2 = $param1 + 6; if($param2 <= 60) { $param2 .= - 6; } echo "substr(".$param1.",".$param2.")<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 - 5.5.36, 5.6.0 - 5.6.28, 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
substr(0,6-6)<br>substr(6,12-6)<br>substr(12,18-6)<br>substr(18,24-6)<br>substr(24,30-6)<br>substr(30,36-6)<br>substr(36,42-6)<br>substr(42,48-6)<br>substr(48,54-6)<br>substr(54,60-6)<br>substr(60,66)<br>
preferences:
244.55 ms | 406 KiB | 363 Q