3v4l.org

run code in 300+ PHP versions simultaneously
<?php const FOO=1; class bar { static $v = [ FOO => 1, FOOX => 1, ]; static $w; } // If following line is commentted out, undefined constant error disappears. var_dump(bar::$w);
Output for 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Fatal error: Uncaught Error: Undefined constant "FOOX" in /in/cN5n4:7 Stack trace: #0 /in/cN5n4(14): [constant expression]() #1 {main} thrown in /in/cN5n4 on line 7
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29
Fatal error: Uncaught Error: Undefined constant "FOOX" in /in/cN5n4:14 Stack trace: #0 {main} thrown in /in/cN5n4 on line 14
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant FOOX - assumed 'FOOX' (this will throw an Error in a future version of PHP) in /in/cN5n4 on line 14 NULL
Output for 7.1.0 - 7.1.33
Notice: Use of undefined constant FOOX - assumed 'FOOX' in /in/cN5n4 on line 14 NULL
preferences:
128.36 ms | 410 KiB | 5 Q