3v4l.org

run code in 300+ PHP versions simultaneously
<?php function &test() { echo "hi"; } $a = &test();
Output for 4.4.0 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
hi Notice: Only variable references should be returned by reference in /in/v5XrY on line 4
Output for 4.3.0 - 4.3.11, 7.3.32 - 7.3.33, 7.4.26
hi
Output for 5.0.0 - 5.0.5
hi Strict Standards: Only variable references should be returned by reference in /in/v5XrY on line 4

preferences:
199.47 ms | 401 KiB | 308 Q