3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( array('first', 'second'), array('next', 'more') ); var_dump(array_merge(...$array));
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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 - 8.2.23, 8.3.0 - 8.3.11
array(4) { [0]=> string(5) "first" [1]=> string(6) "second" [2]=> string(4) "next" [3]=> string(4) "more" }
Output for 5.5.0 - 5.5.38
Parse error: syntax error, unexpected '.' in /in/KA5J1 on line 9
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '.', expecting ')' in /in/KA5J1 on line 9
Process exited with code 255.
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83.12 ms | 408 KiB | 5 Q