3v4l.org

run code in 300+ PHP versions simultaneously
<?php //不使用数组 for($i=1;$i<=20;$i++) { echo $i . "\t"; if($i%5==0) echo "<br/>\n"; }
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 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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
1 2 3 4 5 <br/> 6 7 8 9 10 <br/> 11 12 13 14 15 <br/> 16 17 18 19 20 <br/>
preferences:
256.66 ms | 405 KiB | 460 Q