3v4l.org

run code in 500+ PHP versions simultaneously
<?php $friends="friends"; $countries['mexico']="land of the good people"; echo "Warning: "; echo $countries[mexico]; echo "\n\nValid: "; echo "$countries[mexico]"; echo "\n\nWarning: "; echo "{$countries[mexico]}"; echo "\n\nValid: "; echo "{$countries['mexico']}";
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Warning: Use of undefined constant mexico - assumed 'mexico' (this will throw an Error in a future version of PHP) in /in/mfjOY on line 7 land of the good people Valid: land of the good people Warning: Warning: Use of undefined constant mexico - assumed 'mexico' (this will throw an Error in a future version of PHP) in /in/mfjOY on line 13 land of the good people Valid: land of the good people
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Warning: Notice: Use of undefined constant mexico - assumed 'mexico' in /in/mfjOY on line 7 land of the good people Valid: land of the good people Warning: Notice: Use of undefined constant mexico - assumed 'mexico' in /in/mfjOY on line 13 land of the good people Valid: land of the good people
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Warning: Fatal error: Uncaught Error: Undefined constant "mexico" in /in/mfjOY:7 Stack trace: #0 {main} thrown in /in/mfjOY on line 7
preferences:
37.66 ms | 1144 KiB | 11 Q