3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(E_ALL); function foo(){ return 'string'; } $temp =& foo();
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 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
Notice: Only variables should be assigned by reference in /in/vXUIZ on line 6
preferences:
113.48 ms | 405 KiB | 221 Q