3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = ['1','a','b','c']; echo "$array[2]". "/n"; echo $array [4]= 'd'."/n"; echo $array[]='f'."/n";
Output for 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
b/nd/nf/n

preferences:
191.89 ms | 403 KiB | 284 Q