3v4l.org

run code in 300+ PHP versions simultaneously
<?php function all_local_vars(){ $initial_vars = array_keys(get_defined_vars()); $foo = 0; $bar = 'hoge'; return compact(array_diff(array_keys(get_defined_vars()), $initial_vars)); } var_dump(all_local_vars());
Output for 7.1.25 - 7.1.28, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(3) { ["initial_vars"]=> array(0) { } ["foo"]=> int(0) ["bar"]=> string(4) "hoge" }
preferences:
152.05 ms | 408 KiB | 5 Q