3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo['bar'] = 'dog'; $uh = "ar"; print "{$foo["b$uh"]}";
Output for 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 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
dog
preferences:
70.12 ms | 407 KiB | 5 Q