3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface I { } interface E extends I { } interface C extends I {} interface D extends E, C {} function test1(I $i): void {} function test(D $d): void { test1($d); }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected ':', expecting '{' in /in/LPFYf on line 11
Process exited with code 255.
preferences:
232.07 ms | 402 KiB | 212 Q