3v4l.org

run code in 300+ PHP versions simultaneously
<?php function listing() { return array("foo", "bar"); } $first = reset($array = listing()); var_dump($first); ?>
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught Error: reset(): Argument #1 ($array) could not be passed by reference in /in/ZgJVB:5 Stack trace: #0 {main} thrown in /in/ZgJVB on line 5
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught Error: reset(): Argument #1 ($array) cannot be passed by reference in /in/ZgJVB:5 Stack trace: #0 {main} thrown in /in/ZgJVB on line 5
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0, 7.1.6 - 7.1.20, 7.2.5 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Only variables should be passed by reference in /in/ZgJVB on line 5 string(3) "foo"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 7.3.32 - 7.3.33, 7.4.26
string(3) "foo"
Output for 7.1.5

Process exited with code 137.
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/ZgJVB on line 5 string(3) "foo"

preferences:
178.8 ms | 402 KiB | 344 Q