3v4l.org

run code in 300+ PHP versions simultaneously
<?php function type(int &$a) { $a = 'string !!'; } $a = 42; type($a); var_dump($a);
Output for 7.0.0 - 7.0.33, 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
string(9) "string !!"
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Catchable fatal error: Argument 1 passed to type() must be an instance of int, integer given, called in /in/5IU7i on line 9 and defined in /in/5IU7i on line 3
Process exited with code 255.
preferences:
243.14 ms | 402 KiB | 376 Q