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<?php function returns_null(): void { return; // Fatal error: A void function must not return a value } try { returns_null(); echo "OK!"; } catch (Error $e) { echo "Error:"; var_dump($e); }
based on h0tn2
Output for 7.1.0 - 7.2.0
OK!
Output for 7.0.0 - 7.0.20
Error:object(TypeError)#1 (7) { ["message":protected]=> string(73) "Return value of returns_null() must be an instance of void, none returned" ["string":"Error":private]=> string(0) "" ["code":protected]=> int(0) ["file":protected]=> string(9) "/in/1h9P9" ["line":protected]=> int(4) ["trace":"Error":private]=> array(1) { [0]=> array(4) { ["file"]=> string(9) "/in/1h9P9" ["line"]=> int(8) ["function"]=> string(12) "returns_null" ["args"]=> array(0) { } } } ["previous":"Error":private]=> NULL }
Output for 5.5.0 - 5.6.25
Parse error: syntax error, unexpected ':', expecting '{' in /in/1h9P9 on line 3
Process exited with code 255.