3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace A { const Z = 9; define ('X', 0); } namespace B { const Z = 8; } namespace { use B as BB; const Z = 7; echo BB::Z; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Class "B" not found in /in/4dfnZ:26 Stack trace: #0 {main} thrown in /in/4dfnZ on line 26
Process exited with code 255.
Output for 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
Fatal error: Uncaught Error: Class 'B' not found in /in/4dfnZ:26 Stack trace: #0 {main} thrown in /in/4dfnZ on line 26
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Class 'B' not found in /in/4dfnZ on line 26
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/4dfnZ on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/4dfnZ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/4dfnZ on line 3
Process exited with code 255.

preferences:
268.46 ms | 401 KiB | 462 Q