3v4l.org

run code in 300+ PHP versions simultaneously
<?php function x() { $a = new stdclass; yield $a => $a; } $b = a(); var_dump($b->current()); var_dump($b->key());
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined function a() in /in/Tm4Jp:8 Stack trace: #0 {main} thrown in /in/Tm4Jp on line 8
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Call to undefined function a() in /in/Tm4Jp on line 8
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$a' (T_VARIABLE) in /in/Tm4Jp on line 5
Process exited with code 255.
preferences:
233.92 ms | 401 KiB | 273 Q