3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo (string &...$in): string { return implode(', ', $in); } $x = 1; $y = 2; $z = 3; echo foo($x, $y, $z);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
1, 2, 3
Output for 5.6.0 - 5.6.28
Parse error: syntax error, unexpected ':', expecting '{' in /in/0Nl5s on line 2
Process exited with code 255.
Output for 5.5.0 - 5.5.35
Parse error: syntax error, unexpected '.', expecting variable (T_VARIABLE) in /in/0Nl5s on line 2
Process exited with code 255.
preferences:
82.87 ms | 408 KiB | 5 Q