3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); function a(int &$a, string &$b) { $b = &$a; } $a = 1; $b = "abc"; a($a, $b);
Output for 7.0.0 - 7.0.31, 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 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Warning: Unsupported declare 'strict_types' in /in/cK6oJ on line 3 Catchable fatal error: Argument 1 passed to a() must be an instance of int, integer given, called in /in/cK6oJ on line 11 and defined in /in/cK6oJ on line 5
Process exited with code 255.
preferences:
255.14 ms | 402 KiB | 319 Q