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run code in 200+ php & hhvm versions
Bugs & Features
<?php function get_config(): array { return null; } get_config();
based on 5d0XA
Output for 7.0.0 - 7.2.11
Fatal error: Uncaught TypeError: Return value of get_config() must be of the type array, null returned in /in/glb8E:4 Stack trace: #0 /in/glb8E(6): get_config() #1 {main} thrown in /in/glb8E on line 4
Process exited with code 255.
Output for hhvm-3.22.0
Fatal error: Uncaught TypeError: Value returned from function get_config() must be of type array, null given in /in/glb8E:-1 Stack trace: #0 /in/glb8E(-1): get_config() #1 {main}
Process exited with code 255.
Output for hhvm-3.11.1, hhvm-3.13.2, hhvm-3.17.3 - 3.21.3
Fatal error: Uncaught TypeError: Value returned from function get_config() must be of type array, null given in /in/glb8E:4 Stack trace: #0 /in/glb8E(6): get_config() #1 {main}
Process exited with code 255.
Output for hhvm-3.12.14, hhvm-3.15.4

Process exited with code 137.
Output for hhvm-3.10.1
Fatal error: Syntax only allowed in Hack files (<?hh) or with -v Eval.EnableHipHopSyntax=true in /in/glb8E on line 3
Process exited with code 255.
Output for 5.3.19 - 5.6.38
Parse error: syntax error, unexpected ':', expecting '{' in /in/glb8E on line 3
Process exited with code 255.